diff --git a/config/checkstyle/suppression.xml b/config/checkstyle/suppression.xml
index c460957..5d0bdaa 100644
--- a/config/checkstyle/suppression.xml
+++ b/config/checkstyle/suppression.xml
@@ -8,7 +8,10 @@
     <!-- Effects don't need javadoc. -->
     <suppress files="[\\/]effects[\\/]effects[\\/]" checks="MissingJavadocMethod"/>
     <suppress files="[\\/]effects[\\/]effects[\\/]" checks="JavadocVariable"/>
+    <suppress files="[\\/]conditions[\\/]conditions[\\/]" checks="MissingJavadocMethod"/>
+    <suppress files="[\\/]conditions[\\/]conditions[\\/]" checks="JavadocVariable"/>
 
     <!-- Fields don't need javadoc -->
     <suppress files="Effects.java" checks="JavadocVariable"/>
+    <suppress files="Conditions.java" checks="JavadocVariable"/>
 </suppressions>
\ No newline at end of file
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/EcoArmorPlugin.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/EcoArmorPlugin.java
index 3d8006b..c0596c1 100644
--- a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/EcoArmorPlugin.java
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/EcoArmorPlugin.java
@@ -11,6 +11,7 @@ import com.willfp.ecoarmor.commands.TabcompleterEagive;
 import com.willfp.ecoarmor.display.ArmorDisplay;
 import com.willfp.ecoarmor.effects.Effect;
 import com.willfp.ecoarmor.effects.Effects;
+import com.willfp.ecoarmor.effects.util.EffectWatcher;
 import com.willfp.ecoarmor.sets.ArmorSets;
 import com.willfp.ecoarmor.sets.util.EffectiveDurabilityListener;
 import com.willfp.ecoarmor.sets.util.PotionEffectListener;
@@ -139,7 +140,8 @@ public class EcoArmorPlugin extends AbstractEcoPlugin {
                 new AdvancementShardListener(this),
                 new PotionEffectListener(this),
                 new EffectiveDurabilityListener(this),
-                new DiscoverRecipeListener(this)
+                new DiscoverRecipeListener(this),
+                new EffectWatcher(this)
         );
     }
 
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/Condition.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/Condition.java
new file mode 100644
index 0000000..936fe1c
--- /dev/null
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/Condition.java
@@ -0,0 +1,57 @@
+package com.willfp.ecoarmor.conditions;
+
+import com.willfp.ecoarmor.EcoArmorPlugin;
+import lombok.AccessLevel;
+import lombok.Getter;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Listener;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class Condition<T> implements Listener {
+    /**
+     * Instance of EcoArmor.
+     */
+    @Getter(AccessLevel.PROTECTED)
+    private final EcoArmorPlugin plugin = EcoArmorPlugin.getInstance();
+
+    /**
+     * The name of the effect.
+     */
+    @Getter
+    private final String name;
+
+    /**
+     * The class of the config getter type.
+     */
+    @Getter
+    private final Class<T> typeClass;
+
+    /**
+     * Create a new condition.
+     *
+     * @param name      The condition name.
+     * @param typeClass The class of the config type.
+     */
+    protected Condition(@NotNull final String name,
+                        @NotNull final Class<T> typeClass) {
+        this.name = name;
+        this.typeClass = typeClass;
+
+        Conditions.addNewCondition(this);
+    }
+
+    /**
+     * Get if condition is met for a player.
+     *
+     * @param player The player.
+     * @param value  The value of the condition.
+     * @return If met.
+     */
+    public final boolean isMet(@NotNull final Player player,
+                               @NotNull final Object value) {
+        return isConditionMet(player, typeClass.cast(value));
+    }
+
+    protected abstract boolean isConditionMet(@NotNull Player player,
+                                              @NotNull T value);
+}
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/Conditions.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/Conditions.java
new file mode 100644
index 0000000..0d22f0d
--- /dev/null
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/Conditions.java
@@ -0,0 +1,50 @@
+package com.willfp.ecoarmor.conditions;
+
+import com.google.common.collect.BiMap;
+import com.google.common.collect.HashBiMap;
+import com.google.common.collect.ImmutableList;
+import com.willfp.ecoarmor.conditions.conditions.ConditionBelowY;
+import lombok.experimental.UtilityClass;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.List;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class Conditions {
+    /**
+     * All registered effects.
+     */
+    private static final BiMap<String, Condition<?>> BY_NAME = HashBiMap.create();
+
+    public static final Condition<?> BELOW_Y = new ConditionBelowY();
+
+    /**
+     * Get condition matching name.
+     *
+     * @param name The name to query.
+     * @return The matching condition, or null if not found.
+     */
+    public static Condition<?> getByName(@NotNull final String name) {
+        return BY_NAME.get(name);
+    }
+
+    /**
+     * List of all registered conditions.
+     *
+     * @return The conditions.
+     */
+    public static List<Condition<?>> values() {
+        return ImmutableList.copyOf(BY_NAME.values());
+    }
+
+    /**
+     * Add new condition to EcoArmor.
+     *
+     * @param condition The condition to add.
+     */
+    public static void addNewCondition(@NotNull final Condition<?> condition) {
+        BY_NAME.remove(condition.getName());
+        BY_NAME.put(condition.getName(), condition);
+    }
+}
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/conditions/ConditionBelowY.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/conditions/ConditionBelowY.java
new file mode 100644
index 0000000..cd8f8f1
--- /dev/null
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/conditions/conditions/ConditionBelowY.java
@@ -0,0 +1,44 @@
+package com.willfp.ecoarmor.conditions.conditions;
+
+import com.willfp.ecoarmor.conditions.Condition;
+import com.willfp.ecoarmor.sets.ArmorSet;
+import com.willfp.ecoarmor.sets.util.ArmorUtils;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.jetbrains.annotations.NotNull;
+
+public class ConditionBelowY extends Condition<Double> {
+    public ConditionBelowY() {
+        super("below-y", Double.class);
+    }
+
+    @EventHandler
+    public void listener(@NotNull final PlayerMoveEvent event) {
+        Player player = event.getPlayer();
+
+        ArmorSet set = ArmorUtils.getSetOnPlayer(player);
+
+        if (set == null) {
+            return;
+        }
+
+        Double value = set.getConditionValue(this);
+
+        if (value == null) {
+            return;
+        }
+
+        if (isMet(player, value)) {
+            set.getEffects().keySet().forEach(effect -> effect.enable(player));
+        } else {
+            set.getEffects().keySet().forEach(effect -> effect.disable(player));
+        }
+    }
+
+    @Override
+    public boolean isConditionMet(@NotNull final Player player,
+                                  @NotNull final Double value) {
+        return player.getLocation().getY() < value;
+    }
+}
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/Effect.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/Effect.java
index ff88a3c..2ee6abc 100644
--- a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/Effect.java
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/Effect.java
@@ -3,9 +3,12 @@ package com.willfp.ecoarmor.effects;
 import com.willfp.ecoarmor.EcoArmorPlugin;
 import lombok.AccessLevel;
 import lombok.Getter;
+import org.bukkit.entity.Player;
 import org.bukkit.event.Listener;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.HashSet;
+import java.util.Set;
 import java.util.UUID;
 
 public abstract class Effect<T> implements Listener {
@@ -39,6 +42,11 @@ public abstract class Effect<T> implements Listener {
     @Getter
     private final Class<T> typeClass;
 
+    /**
+     * Players that the effect is currently enabled for.
+     */
+    private final Set<UUID> enabledPlayers = new HashSet<>();
+
     /**
      * Create a new effect.
      *
@@ -54,6 +62,53 @@ public abstract class Effect<T> implements Listener {
         update();
         Effects.addNewEffect(this);
     }
+    /**
+     * Get if effect is enabled for player.
+     *
+     * @param player The player.
+     * @return If enabled.
+     */
+    public final boolean isEnabledForPlayer(@NotNull final Player player) {
+        return enabledPlayers.contains(player.getUniqueId());
+    }
+
+    /**
+     * Enable the effect for a player.
+     *
+     * @param player The player.
+     */
+    public final void enable(@NotNull final Player player) {
+        if (enabledPlayers.contains(player.getUniqueId())) {
+            return;
+        }
+
+        enabledPlayers.add(player.getUniqueId());
+
+        this.onEnable(player);
+    }
+
+    /**
+     * Disable the effect for a player.
+     *
+     * @param player The player.
+     */
+    public final void disable(@NotNull final Player player) {
+        if (!enabledPlayers.contains(player.getUniqueId())) {
+            return;
+        }
+
+        enabledPlayers.remove(player.getUniqueId());
+
+        this.onDisable(player);
+    }
+
+    protected void onEnable(@NotNull final Player player) {
+        // Empty by default
+    }
+
+    protected void onDisable(@NotNull final Player player) {
+        // Empty by default
+    }
 
     /**
      * Update if the effect is enabled.
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/effects/SpeedMultiplier.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/effects/SpeedMultiplier.java
index 127a872..acdc6e5 100644
--- a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/effects/SpeedMultiplier.java
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/effects/SpeedMultiplier.java
@@ -1,13 +1,11 @@
 package com.willfp.ecoarmor.effects.effects;
 
-import com.willfp.eco.util.events.armorequip.ArmorEquipEvent;
 import com.willfp.ecoarmor.effects.Effect;
 import com.willfp.ecoarmor.sets.util.ArmorUtils;
 import org.bukkit.attribute.Attribute;
 import org.bukkit.attribute.AttributeInstance;
 import org.bukkit.attribute.AttributeModifier;
 import org.bukkit.entity.Player;
-import org.bukkit.event.EventHandler;
 import org.jetbrains.annotations.NotNull;
 
 public class SpeedMultiplier extends Effect<Double> {
@@ -15,23 +13,28 @@ public class SpeedMultiplier extends Effect<Double> {
         super("speed-multiplier", Double.class);
     }
 
-    @EventHandler
-    public void listener(@NotNull final ArmorEquipEvent event) {
-        Player player = event.getPlayer();
-
+    @Override
+    protected void onEnable(@NotNull final Player player) {
         AttributeInstance movementSpeed = player.getAttribute(Attribute.GENERIC_MOVEMENT_SPEED);
         assert movementSpeed != null;
 
-        this.getPlugin().getScheduler().runLater(() -> {
-            Double multiplier = ArmorUtils.getEffectStrength(player, this);
-            if (multiplier == null) {
-                movementSpeed.removeModifier(new AttributeModifier(this.getUuid(), "speed-multiplier", 0, AttributeModifier.Operation.MULTIPLY_SCALAR_1));
-            } else {
-                AttributeModifier modifier = new AttributeModifier(this.getUuid(), "speed-multiplier", multiplier - 1, AttributeModifier.Operation.MULTIPLY_SCALAR_1);
-                if (!movementSpeed.getModifiers().contains(modifier)) {
-                    movementSpeed.addModifier(modifier);
-                }
-            }
-        }, 1);
+        Double strength = ArmorUtils.getEffectStrength(player, this);
+
+        if (strength == null) {
+            return;
+        }
+
+        AttributeModifier modifier = new AttributeModifier(this.getUuid(), "speed-multiplier", strength - 1, AttributeModifier.Operation.MULTIPLY_SCALAR_1);
+        if (!movementSpeed.getModifiers().contains(modifier)) {
+            movementSpeed.addModifier(modifier);
+        }
+    }
+
+    @Override
+    protected void onDisable(@NotNull final Player player) {
+        AttributeInstance movementSpeed = player.getAttribute(Attribute.GENERIC_MOVEMENT_SPEED);
+        assert movementSpeed != null;
+
+        movementSpeed.removeModifier(new AttributeModifier(this.getUuid(), "speed-multiplier", 0, AttributeModifier.Operation.MULTIPLY_SCALAR_1));
     }
 }
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/util/EffectWatcher.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/util/EffectWatcher.java
new file mode 100644
index 0000000..97e3795
--- /dev/null
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/effects/util/EffectWatcher.java
@@ -0,0 +1,60 @@
+package com.willfp.ecoarmor.effects.util;
+
+import com.willfp.eco.util.events.armorequip.ArmorEquipEvent;
+import com.willfp.eco.util.internal.PluginDependent;
+import com.willfp.eco.util.plugin.AbstractEcoPlugin;
+import com.willfp.ecoarmor.effects.Effect;
+import com.willfp.ecoarmor.effects.Effects;
+import com.willfp.ecoarmor.sets.ArmorSet;
+import com.willfp.ecoarmor.sets.util.ArmorUtils;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.jetbrains.annotations.NotNull;
+
+public class EffectWatcher extends PluginDependent implements Listener {
+    /**
+     * Pass an {@link AbstractEcoPlugin} in order to interface with it.
+     *
+     * @param plugin The plugin to manage.
+     */
+    public EffectWatcher(@NotNull final AbstractEcoPlugin plugin) {
+        super(plugin);
+    }
+
+    /**
+     * Listener for armor equipping.
+     *
+     * @param event The event to listen for.
+     */
+    @EventHandler
+    public void armorEquipListener(@NotNull final ArmorEquipEvent event) {
+        Player player = event.getPlayer();
+
+        this.getPlugin().getScheduler().runLater(() -> {
+            ArmorSet set = ArmorUtils.getSetOnPlayer(player);
+
+            for (Effect<?> effect : Effects.values()) {
+                boolean enabled = true;
+
+                if (set == null) {
+                    enabled = false;
+                } else {
+                    if (set.getEffectStrength(effect) == null) {
+                        enabled = false;
+                    }
+
+                    if (ArmorUtils.areConditionsMet(player)) {
+                        enabled = false;
+                    }
+                }
+
+                if (enabled) {
+                    effect.enable(player);
+                } else {
+                    effect.disable(player);
+                }
+            }
+        }, 1);
+    }
+}
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/sets/ArmorSet.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/sets/ArmorSet.java
index 652d717..ffc0519 100644
--- a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/sets/ArmorSet.java
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/sets/ArmorSet.java
@@ -8,6 +8,8 @@ import com.willfp.eco.util.recipe.RecipeParts;
 import com.willfp.eco.util.recipe.parts.ComplexRecipePart;
 import com.willfp.eco.util.recipe.recipes.EcoShapedRecipe;
 import com.willfp.ecoarmor.EcoArmorPlugin;
+import com.willfp.ecoarmor.conditions.Condition;
+import com.willfp.ecoarmor.conditions.Conditions;
 import com.willfp.ecoarmor.effects.Effect;
 import com.willfp.ecoarmor.effects.Effects;
 import com.willfp.ecoarmor.sets.meta.ArmorSlot;
@@ -55,6 +57,12 @@ public class ArmorSet {
     @Getter(AccessLevel.PRIVATE)
     private final AbstractUndefinedConfig config;
 
+    /**
+     * Conditions and their values.
+     */
+    @Getter
+    private final Map<Condition<?>, Object> conditions = new HashMap<>();
+
     /**
      * Effects and their strengths.
      */
@@ -115,6 +123,14 @@ public class ArmorSet {
         this.config = config;
         this.name = name;
 
+        for (String definedKey : this.getConfig().getStrings("conditions")) {
+            String[] split = definedKey.split(":");
+            String key = split[0].trim();
+            String value = split[1].trim();
+            Condition<?> condition = Conditions.getByName(key);
+            conditions.put(condition, ArmorUtils.getConditionValue(value, condition));
+        }
+
         for (String definedKey : this.getConfig().getStrings("set-bonus")) {
             String[] split = definedKey.split(":");
             String key = split[0].trim();
@@ -324,6 +340,18 @@ public class ArmorSet {
         return advancedItems.get(slot);
     }
 
+    /**
+     * Get condition value of effect.
+     *
+     * @param condition The condition to query.
+     * @param <T>       The type of the condition value.
+     * @return The value.
+     */
+    @Nullable
+    public <T> T getConditionValue(@NotNull final Condition<T> condition) {
+        return (T) conditions.get(condition);
+    }
+
     /**
      * Get effect strength of effect.
      *
diff --git a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/sets/util/ArmorUtils.java b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/sets/util/ArmorUtils.java
index a802f56..8c6dc21 100644
--- a/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/sets/util/ArmorUtils.java
+++ b/eco-core/core-plugin/src/main/java/com/willfp/ecoarmor/sets/util/ArmorUtils.java
@@ -1,6 +1,7 @@
 package com.willfp.ecoarmor.sets.util;
 
 import com.willfp.ecoarmor.EcoArmorPlugin;
+import com.willfp.ecoarmor.conditions.Condition;
 import com.willfp.ecoarmor.effects.Effect;
 import com.willfp.ecoarmor.sets.ArmorSet;
 import com.willfp.ecoarmor.sets.ArmorSets;
@@ -20,6 +21,7 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.UUID;
 
 @UtilityClass
@@ -133,6 +135,46 @@ public class ArmorUtils {
         return getEffectStrength(player, effect) != null;
     }
 
+    /**
+     * Get the value of a condition on a player's set.
+     *
+     * @param player    The player to test.
+     * @param condition The condition to test.
+     * @param <T>       Condition type.
+     * @return The value or null if not found.
+     */
+    @Nullable
+    public <T> T getConditionValue(@NotNull final Player player,
+                                   @NotNull final Condition<T> condition) {
+        ArmorSet set = getSetOnPlayer(player);
+        if (set == null) {
+            return null;
+        }
+
+        return set.getConditionValue(condition);
+    }
+
+    /**
+     * Get if all conditions are met for a player.
+     *
+     * @param player The player.
+     * @return If conditions are men.
+     */
+    public boolean areConditionsMet(@NotNull final Player player) {
+        ArmorSet set = getSetOnPlayer(player);
+        if (set == null) {
+            return true;
+        }
+
+        for (Map.Entry<Condition<?>, Object> entry : set.getConditions().entrySet()) {
+            if (!entry.getKey().isMet(player, entry.getValue())) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     /**
      * Get tier on upgrade crystal.
      *
@@ -184,7 +226,7 @@ public class ArmorUtils {
      * Set tier on item.
      *
      * @param itemStack The item to check.
-     * @param tier  The tier to set.
+     * @param tier      The tier to set.
      */
     public static void setTier(@NotNull final ItemStack itemStack,
                                @NotNull final Tier tier) {
@@ -382,4 +424,30 @@ public class ArmorUtils {
 
         return string;
     }
+
+    /**
+     * Get value of condition.
+     *
+     * @param string    Value as string.
+     * @param condition Condition.
+     * @param <T>       The type of the condition.
+     * @return Value.
+     */
+    @NotNull
+    public static <T> Object getConditionValue(@NotNull final String string,
+                                               @NotNull final Condition<T> condition) {
+        if (condition.getTypeClass().equals(Boolean.class)) {
+            return Boolean.parseBoolean(string);
+        }
+
+        if (condition.getTypeClass().equals(Integer.class)) {
+            return Integer.parseInt(string);
+        }
+
+        if (condition.getTypeClass().equals(Double.class)) {
+            return Double.parseDouble(string);
+        }
+
+        return string;
+    }
 }
diff --git a/eco-core/core-plugin/src/main/resources/sets/young.yml b/eco-core/core-plugin/src/main/resources/sets/young.yml
index 16d7c26..fe99704 100644
--- a/eco-core/core-plugin/src/main/resources/sets/young.yml
+++ b/eco-core/core-plugin/src/main/resources/sets/young.yml
@@ -1,4 +1,6 @@
 enabled: true
+conditions:
+  - "below-y: 40"
 set-bonus:
   - "speed-multiplier: 1.25"
 advanced-set-bonus: