diff --git a/code/modules/clothing/head/hardhat.dm b/code/modules/clothing/head/hardhat.dm
index ef8239f0dfc8..c83ec4ba12d9 100644
--- a/code/modules/clothing/head/hardhat.dm
+++ b/code/modules/clothing/head/hardhat.dm
@@ -13,6 +13,7 @@
 	actions_types = list(/datum/action/item_action/toggle_helmet_light)
 	resistance_flags = FIRE_PROOF
 	dynamic_hair_suffix = "+generic"
+	hattable = FALSE
 
 	dog_fashion = /datum/dog_fashion/head
 
diff --git a/code/modules/clothing/suits/bio.dm b/code/modules/clothing/suits/bio.dm
index 62fd135de8e1..890fe91e7837 100644
--- a/code/modules/clothing/suits/bio.dm
+++ b/code/modules/clothing/suits/bio.dm
@@ -9,6 +9,7 @@
 	flags_inv = HIDEMASK|HIDEEARS|HIDEEYES|HIDEHAIR|HIDEFACIALHAIR|HIDEFACE
 	resistance_flags = ACID_PROOF
 	flags_cover = HEADCOVERSEYES | HEADCOVERSMOUTH
+	hattable = FALSE
 
 /obj/item/clothing/suit/bio_suit
 	name = "bio suit"
diff --git a/code/modules/clothing/suits/utility.dm b/code/modules/clothing/suits/utility.dm
index 3d6d8dc3382d..78e1fd346dc2 100644
--- a/code/modules/clothing/suits/utility.dm
+++ b/code/modules/clothing/suits/utility.dm
@@ -70,6 +70,7 @@
 	equip_delay_other = 70
 	flags_cover = HEADCOVERSEYES | HEADCOVERSMOUTH
 	resistance_flags = NONE
+	hattable = FALSE
 
 
 /obj/item/clothing/suit/bomb_suit
@@ -128,6 +129,7 @@
 	flags_cover = HEADCOVERSEYES | HEADCOVERSMOUTH
 	resistance_flags = NONE
 	flags_1 = RAD_PROTECT_CONTENTS_1
+	hattable = FALSE
 
 /obj/item/clothing/suit/radiation
 	name = "radiation suit"