diff --git a/code/game/machinery/washing_machine.dm b/code/game/machinery/washing_machine.dm
index edb8e56155..cb3e319915 100644
--- a/code/game/machinery/washing_machine.dm
+++ b/code/game/machinery/washing_machine.dm
@@ -59,8 +59,8 @@
 		I.decontaminate()
 
 	//Tanning!
-	for(var/obj/item/stack/material/hairlesshide/HH in washing)
-		var/obj/item/stack/material/wetleather/WL = new(src)
+	for(var/obj/item/stack/hairlesshide/HH in washing)
+		var/obj/item/stack/wetleather/WL = new(src)
 		WL.amount = HH.amount
 		qdel(HH)
 
diff --git a/code/game/objects/items/stacks/sheets/leather.dm b/code/game/objects/items/stacks/sheets/leather.dm
index 255a739d84..ad3e349ba7 100644
--- a/code/game/objects/items/stacks/sheets/leather.dm
+++ b/code/game/objects/items/stacks/sheets/leather.dm
@@ -1,4 +1,4 @@
-/obj/item/stack/material/animalhide/human
+/obj/item/stack/animalhide/human
 	name = "human skin"
 	desc = "The by-product of human farming."
 	singular_name = "human skin piece"
@@ -6,63 +6,63 @@
 	no_variants = FALSE
 	drop_sound = 'sound/items/drop/clothing.ogg'
 
-/obj/item/stack/material/animalhide/human
+/obj/item/stack/animalhide/human
 	amount = 50
 
-/obj/item/stack/material/animalhide/corgi
+/obj/item/stack/animalhide/corgi
 	name = "corgi hide"
 	desc = "The by-product of corgi farming."
 	singular_name = "corgi hide piece"
 	icon_state = "sheet-corgi"
 
-/obj/item/stack/material/animalhide/corgi
+/obj/item/stack/animalhide/corgi
 	amount = 50
 
-/obj/item/stack/material/animalhide/cat
+/obj/item/stack/animalhide/cat
 	name = "cat hide"
 	desc = "The by-product of cat farming."
 	singular_name = "cat hide piece"
 	icon_state = "sheet-cat"
 
-/obj/item/stack/material/animalhide/cat
+/obj/item/stack/animalhide/cat
 	amount = 50
 
-/obj/item/stack/material/animalhide/monkey
+/obj/item/stack/animalhide/monkey
 	name = "monkey hide"
 	desc = "The by-product of monkey farming."
 	singular_name = "monkey hide piece"
 	icon_state = "sheet-monkey"
 
-/obj/item/stack/material/animalhide/monkey
+/obj/item/stack/animalhide/monkey
 	amount = 50
 
-/obj/item/stack/material/animalhide/lizard
+/obj/item/stack/animalhide/lizard
 	name = "lizard skin"
 	desc = "Sssssss..."
 	singular_name = "lizard skin piece"
 	icon_state = "sheet-lizard"
 
-/obj/item/stack/material/animalhide/lizard
+/obj/item/stack/animalhide/lizard
 	amount = 50
 
-/obj/item/stack/material/animalhide/xeno
+/obj/item/stack/animalhide/xeno
 	name = "alien hide"
 	desc = "The skin of a terrible creature."
 	singular_name = "alien hide piece"
 	icon_state = "sheet-xeno"
 
-/obj/item/stack/material/animalhide/xeno
+/obj/item/stack/animalhide/xeno
 	amount = 50
 
 //don't see anywhere else to put these, maybe together they could be used to make the xenos suit?
-/obj/item/stack/material/xenochitin
+/obj/item/stack/xenochitin
 	name = "alien chitin"
 	desc = "A piece of the hide of a terrible creature."
 	singular_name = "alien hide piece"
 	icon = 'icons/mob/alien.dmi'
 	icon_state = "chitin"
 
-/obj/item/stack/material/xenochitin
+/obj/item/stack/xenochitin
 	amount = 50
 
 /obj/item/xenos_claw
@@ -77,17 +77,17 @@
 	icon = 'icons/mob/alien.dmi'
 	icon_state = "weed_extract"
 
-/obj/item/stack/material/hairlesshide
+/obj/item/stack/hairlesshide
 	name = "hairless hide"
 	desc = "This hide was stripped of it's hair, but still needs tanning."
 	singular_name = "hairless hide piece"
 	icon_state = "sheet-hairlesshide"
 	no_variants = FALSE
 
-/obj/item/stack/material/hairlesshide
+/obj/item/stack/hairlesshide
 	amount = 50
 
-/obj/item/stack/material/wetleather
+/obj/item/stack/wetleather
 	name = "wet leather"
 	desc = "This leather has been cleaned but still needs to be dried."
 	singular_name = "wet leather piece"
@@ -96,11 +96,11 @@
 	var/drying_threshold_temperature = 500 //Kelvin to start drying
 	no_variants = FALSE
 
-/obj/item/stack/material/wetleather
+/obj/item/stack/wetleather
 	amount = 50
 
 //Step one - dehairing.
-/obj/item/stack/material/animalhide/attackby(obj/item/weapon/W as obj, mob/user as mob)
+/obj/item/stack/animalhide/attackby(obj/item/weapon/W as obj, mob/user as mob)
 	if(	istype(W, /obj/item/weapon/material/knife) || \
 		istype(W, /obj/item/weapon/material/twohanded/fireaxe) || \
 		istype(W, /obj/item/weapon/material/knife/machete/hatchet) )
@@ -110,13 +110,13 @@
 		if(do_after(user,50))
 			to_chat(usr, "<span class='notice'>You cut the hair from this [src.singular_name]</span>")
 			//Try locating an exisitng stack on the tile and add to there if possible
-			for(var/obj/item/stack/material/hairlesshide/HS in usr.loc)
+			for(var/obj/item/stack/hairlesshide/HS in usr.loc)
 				if(HS.amount < 50)
 					HS.amount++
 					src.use(1)
 					break
 			//If it gets to here it means it did not find a suitable stack on the tile.
-			var/obj/item/stack/material/hairlesshide/HS = new(usr.loc)
+			var/obj/item/stack/hairlesshide/HS = new(usr.loc)
 			HS.amount = 1
 			src.use(1)
 	else
@@ -126,7 +126,7 @@
 //Step two - washing..... it's actually in washing machine code.
 
 //Step three - drying
-/obj/item/stack/material/wetleather/fire_act(datum/gas_mixture/air, exposed_temperature, exposed_volume)
+/obj/item/stack/wetleather/fire_act(datum/gas_mixture/air, exposed_temperature, exposed_volume)
 	..()
 	if(exposed_temperature >= drying_threshold_temperature)
 		wetness--
diff --git a/code/modules/awaymissions/loot_vr.dm b/code/modules/awaymissions/loot_vr.dm
index ad5d566ef7..e4dcd06464 100644
--- a/code/modules/awaymissions/loot_vr.dm
+++ b/code/modules/awaymissions/loot_vr.dm
@@ -52,7 +52,7 @@
 				var/amount = rand(2,6)
 				var/quantity = rand(10,50)
 				var/list/possible_spawns = list()
-				for(var/bar_type in typesof(/obj/item/stack/material) - /obj/item/stack/material - /obj/item/stack/material/animalhide - typesof(/obj/item/stack/material/cyborg))
+				for(var/bar_type in typesof(/obj/item/stack/material) - /obj/item/stack/material - /obj/item/stack/animalhide - typesof(/obj/item/stack/material/cyborg))
 					possible_spawns += bar_type
 
 				var/bar_type = pick(possible_spawns)
diff --git a/code/modules/reagents/Chemistry-Recipes_vr.dm b/code/modules/reagents/Chemistry-Recipes_vr.dm
index 6044f611fe..78e50c807b 100644
--- a/code/modules/reagents/Chemistry-Recipes_vr.dm
+++ b/code/modules/reagents/Chemistry-Recipes_vr.dm
@@ -207,11 +207,11 @@
 
 		var/blocked = list(
 							/obj/item/stack/material,					//Technical stacks
-							/obj/item/stack/material/hairlesshide,		//Useless leather production steps
-							/obj/item/stack/material/wetleather,
+							/obj/item/stack/hairlesshide,		//Useless leather production steps
+							/obj/item/stack/wetleather,
 							/obj/item/stack/material/algae/ten)			//Why is this one even a separate thing
 		blocked += typesof(/obj/item/stack/material/cyborg)				//Borg matter synths, should only exist in borgs
-		blocked += typesof(/obj/item/stack/material/animalhide)			//Hides which are only used for leather production anyway
+		blocked += typesof(/obj/item/stack/animalhide)			//Hides which are only used for leather production anyway
 
 		var/rare_types = list(
 							/obj/item/stack/material/morphium,			//Complex materials requiring Particle Smasher to create