diff --git a/armor_mithril/init.lua b/armor_mithril/init.lua
index cdec0db..f3c0884 100644
--- a/armor_mithril/init.lua
+++ b/armor_mithril/init.lua
@@ -28,7 +28,7 @@ if armor.materials.mithril then
 	armor:register_armor(":3d_armor:helmet_mithril", {
 		description = S("Mithril Helmet"),
 		inventory_image = "3d_armor_inv_helmet_mithril.png",
-		groups = {armor_head=1, armor_heal=13, armor_use=66},
+		groups = {armor_head=1, armor_heal=13, armor_use=66, physics_speed=0.1},
 		armor_groups = {fleshy=16},
 		damage_groups = {cracky=2, snappy=1, level=3},
 	})
@@ -46,7 +46,7 @@ if armor.materials.mithril then
 	armor:register_armor(":3d_armor:chestplate_mithril", {
 		description = S("Mithril Chestplate"),
 		inventory_image = "3d_armor_inv_chestplate_mithril.png",
-		groups = {armor_torso=1, armor_heal=13, armor_use=66},
+		groups = {armor_torso=1, armor_heal=13, armor_use=66, physics_speed=0.4},
 		armor_groups = {fleshy=21},
 		damage_groups = {cracky=2, snappy=1, level=3},
 	})
@@ -64,7 +64,7 @@ if armor.materials.mithril then
 	armor:register_armor(":3d_armor:leggings_mithril", {
 		description = S("Mithril Leggings"),
 		inventory_image = "3d_armor_inv_leggings_mithril.png",
-		groups = {armor_legs=1, armor_heal=13, armor_use=66},
+		groups = {armor_legs=1, armor_heal=13, armor_use=66, physics_speed=0.3},
 		armor_groups = {fleshy=21},
 		damage_groups = {cracky=2, snappy=1, level=3},
 	})
@@ -82,7 +82,7 @@ if armor.materials.mithril then
 	armor:register_armor(":3d_armor:boots_mithril", {
 		description = S("Mithril Boots"),
 		inventory_image = "3d_armor_inv_boots_mithril.png",
-		groups = {armor_feet=1, armor_heal=13, armor_use=66},
+		groups = {armor_feet=1, armor_heal=13, armor_use=66, physics_speed=0.1},
 		armor_groups = {fleshy=16},
 		damage_groups = {cracky=2, snappy=1, level=3},
 	})