diff --git a/code/modules/clothing/masks/gasmask.dm b/code/modules/clothing/masks/gasmask.dm
index 80a1bedadae..d467406de66 100644
--- a/code/modules/clothing/masks/gasmask.dm
+++ b/code/modules/clothing/masks/gasmask.dm
@@ -146,7 +146,7 @@
 	magical = TRUE
 
 /obj/item/clothing/mask/gas/clown_hat/nodrop
-	flags = NODROP
+	flags = BLOCK_GAS_SMOKE_EFFECT | AIRTIGHT | BLOCKHAIR | NODROP
 
 /obj/item/clothing/mask/gas/mime
 	name = "mime mask"
@@ -162,7 +162,7 @@
 	magical = TRUE
 
 /obj/item/clothing/mask/gas/mime/nodrop
-	flags = NODROP
+	flags = BLOCK_GAS_SMOKE_EFFECT | AIRTIGHT | NODROP
 
 /obj/item/clothing/mask/gas/monkeymask
 	name = "monkey mask"