Replace all secondary flags with bitflags stored in the flags_2 var

code/modules/clothing/masks/breath.dm

@@ -4,8 +4,8 @@
 	icon_state = "breath"
 	item_state = "m_mask"
 	body_parts_covered = 0
-	flags = MASKINTERNALS
-	visor_flags = MASKINTERNALS
+	flags_1 = MASKINTERNALS_1
+	visor_flags = MASKINTERNALS_1
 	w_class = WEIGHT_CLASS_SMALL
 	gas_transfer_coefficient = 0.10
 	permeability_coefficient = 0.50

code/modules/clothing/masks/gasmask.dm

@@ -2,7 +2,7 @@
 	name = "gas mask"
 	desc = "A face-covering mask that can be connected to an air supply. While good for concealing your identity, it isn't good for blocking gas flow." //More accurate
 	icon_state = "gas_alt"
-	flags = BLOCK_GAS_SMOKE_EFFECT | MASKINTERNALS
+	flags_1 = BLOCK_GAS_SMOKE_EFFECT_1 | MASKINTERNALS_1
 	flags_inv = HIDEEARS|HIDEEYES|HIDEFACE|HIDEFACIALHAIR
 	w_class = WEIGHT_CLASS_NORMAL
 	item_state = "gas_alt"
@@ -52,7 +52,7 @@
 /obj/item/clothing/mask/gas/clown_hat
 	name = "clown wig and mask"
 	desc = "A true prankster's facial attire. A clown is incomplete without his wig and mask."
-	flags = MASKINTERNALS
+	flags_1 = MASKINTERNALS_1
 	icon_state = "clown"
 	item_state = "clown_hat"
 	flags_cover = MASKCOVERSEYES
@@ -84,7 +84,7 @@
 /obj/item/clothing/mask/gas/sexyclown
 	name = "sexy-clown wig and mask"
 	desc = "A feminine clown mask for the dabbling crossdressers or female entertainers."
-	flags = MASKINTERNALS
+	flags_1 = MASKINTERNALS_1
 	icon_state = "sexyclown"
 	item_state = "sexyclown"
 	flags_cover = MASKCOVERSEYES
@@ -93,7 +93,7 @@
 /obj/item/clothing/mask/gas/mime
 	name = "mime mask"
 	desc = "The traditional mime's mask. It has an eerie facial posture."
-	flags = MASKINTERNALS
+	flags_1 = MASKINTERNALS_1
 	icon_state = "mime"
 	item_state = "mime"
 	flags_cover = MASKCOVERSEYES
@@ -125,7 +125,7 @@
 /obj/item/clothing/mask/gas/monkeymask
 	name = "monkey mask"
 	desc = "A mask used when acting as a monkey."
-	flags = MASKINTERNALS
+	flags_1 = MASKINTERNALS_1
 	icon_state = "monkeymask"
 	item_state = "monkeymask"
 	flags_cover = MASKCOVERSEYES
@@ -134,7 +134,7 @@
 /obj/item/clothing/mask/gas/sexymime
 	name = "sexy mime mask"
 	desc = "A traditional female mime's mask."
-	flags = MASKINTERNALS
+	flags_1 = MASKINTERNALS_1
 	icon_state = "sexymime"
 	item_state = "sexymime"
 	flags_cover = MASKCOVERSEYES
@@ -155,7 +155,7 @@
 	name = "owl mask"
 	desc = "Twoooo!"
 	icon_state = "owl"
-	flags = MASKINTERNALS
+	flags_1 = MASKINTERNALS_1
 	flags_cover = MASKCOVERSEYES
 	resistance_flags = FLAMMABLE
 

code/modules/clothing/masks/hailer.dm

@@ -7,10 +7,10 @@
 	actions_types = list(/datum/action/item_action/halt, /datum/action/item_action/adjust)
 	icon_state = "sechailer"
 	item_state = "sechailer"
-	flags = BLOCK_GAS_SMOKE_EFFECT | MASKINTERNALS
+	flags_1 = BLOCK_GAS_SMOKE_EFFECT_1 | MASKINTERNALS_1
 	flags_inv = HIDEFACIALHAIR|HIDEFACE
 	w_class = WEIGHT_CLASS_SMALL
-	visor_flags = BLOCK_GAS_SMOKE_EFFECT | MASKINTERNALS
+	visor_flags = BLOCK_GAS_SMOKE_EFFECT_1 | MASKINTERNALS_1
 	visor_flags_inv = HIDEFACE
 	flags_cover = MASKCOVERSMOUTH
 	visor_flags_cover = MASKCOVERSMOUTH