diff --git a/code/modules/mod/mod_control.dm b/code/modules/mod/mod_control.dm
index aebf4865daf..cbd299e8b58 100644
--- a/code/modules/mod/mod_control.dm
+++ b/code/modules/mod/mod_control.dm
@@ -572,6 +572,11 @@
 			balloon_alert(user, "[new_module] incompatible with [src]'s parts!")
 			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
 		return
+	if(!new_module.can_install(src))
+		if(user)
+			balloon_alert(user, "[new_module] cannot be installed into [src]!")
+			playsound(src, 'sound/machines/scanbuzz.ogg', 25, TRUE, SILENCED_SOUND_EXTRARANGE)
+		return
 	new_module.forceMove(src)
 	modules += new_module
 	complexity += new_module.complexity
diff --git a/code/modules/mod/mod_theme.dm b/code/modules/mod/mod_theme.dm
index 276183eeb92..15dcf4f9bef 100644
--- a/code/modules/mod/mod_theme.dm
+++ b/code/modules/mod/mod_theme.dm
@@ -199,6 +199,8 @@
 				UNSEALED_CLOTHING = SNUG_FIT|THICKMATERIAL,
 				UNSEALED_MESSAGE = HELMET_UNSEAL_MESSAGE,
 				SEALED_MESSAGE = HELMET_SEAL_MESSAGE,
+				UNSEALED_INVISIBILITY = HIDEFACIALHAIR|HIDEEARS|HIDEEYES|HIDEHAIR|HIDESNOUT,
+				SEALED_COVER = HEADCOVERSEYES,
 			),
 			/obj/item/clothing/suit/mod = list(
 				UNSEALED_CLOTHING = THICKMATERIAL,
diff --git a/code/modules/mod/modules/_module.dm b/code/modules/mod/modules/_module.dm
index a9bb181cf6b..551145b5e6d 100644
--- a/code/modules/mod/modules/_module.dm
+++ b/code/modules/mod/modules/_module.dm
@@ -94,6 +94,10 @@
 		needed_slots -= needed_slot
 	return !length(needed_slots)
 
+/// Additional checks for whenever a module can be installed into a suit or not
+/obj/item/mod/module/proc/can_install(obj/item/mod/control/mod)
+	return TRUE
+
 /// Called when the module is selected from the TGUI, radial or the action button
 /obj/item/mod/module/proc/on_select()
 	if(!mod.wearer)
diff --git a/code/modules/mod/modules/modules_general.dm b/code/modules/mod/modules/modules_general.dm
index f1b14b0f900..3b7803a517a 100644
--- a/code/modules/mod/modules/modules_general.dm
+++ b/code/modules/mod/modules/modules_general.dm
@@ -310,6 +310,15 @@
 		mask.flags_cover &= ~(MASKCOVERSMOUTH |PEPPERPROOF)
 		mask.visor_flags_cover &= ~(MASKCOVERSMOUTH |PEPPERPROOF)
 
+/obj/item/mod/module/mouthhole/can_install(obj/item/mod/control/mod)
+	var/obj/item/clothing/helmet = mod.get_part_from_slot(ITEM_SLOT_HEAD)
+	var/obj/item/clothing/mask = mod.get_part_from_slot(ITEM_SLOT_MASK)
+	if(istype(helmet) && ((helmet.flags_cover|helmet.visor_flags_cover) & (HEADCOVERSMOUTH|PEPPERPROOF)))
+		return ..()
+	if(istype(mask) && ((mask.flags_cover|mask.visor_flags_cover) & (MASKCOVERSMOUTH|PEPPERPROOF)))
+		return ..()
+	return FALSE
+
 /obj/item/mod/module/mouthhole/on_uninstall(deleting = FALSE)
 	if(deleting)
 		return
diff --git a/icons/mob/clothing/modsuit/mod_clothing.dmi b/icons/mob/clothing/modsuit/mod_clothing.dmi
index cb2a472c32e..aa9b6feca11 100644
Binary files a/icons/mob/clothing/modsuit/mod_clothing.dmi and b/icons/mob/clothing/modsuit/mod_clothing.dmi differ
diff --git a/icons/obj/clothing/modsuit/mod_clothing.dmi b/icons/obj/clothing/modsuit/mod_clothing.dmi
index 6ab49417aa5..160606c790a 100644
Binary files a/icons/obj/clothing/modsuit/mod_clothing.dmi and b/icons/obj/clothing/modsuit/mod_clothing.dmi differ