Description
Big Foot V4 Toxic Gas M04 Mask with Fan (Black)
The Big Foot V4 Toxic Gas M04 Mask with Fan is a full-face mask in black, styled after a military respirator with twin eyepieces and a side-mounted canister. Inside the canister is a small fan that draws air through the mask to help keep the lenses clear and your face cooler.
It is not a real respirator, but a replica designed for airsoft and cosplay. Black gives the classic respirator look and matches any loadout, from all-black CQB kit to post-apocalyptic and roleplay costumes.
Design
The moulded body covers the eyes, nose, mouth and cheeks in one piece, so there is no gap between goggles and lower-face protection. Head straps hold it in place, and the product photo shows fittings on the upper edge that are typically used to attach a mask like this to a helmet; check the photos for details.
Full-face masks keep everything protected in one piece, which is reassuring at close range in CQB. Twin eyepieces give a more restricted field of view than open goggles, so take a little time to get used to it before your first game.
The fan
The fan helps move air around the inside of the mask. The battery type is not stated on our listing, and batteries may not be included, so check before game day and carry spares. Switch the fan off between games to save battery life.
Eye protection
No impact rating is stated on our listing for the eyepieces. Sites set their own rules for eye protection, so check the markings on the mask and your site’s requirements before relying on it as your eye protection.
Key features
- Full-face respirator-style mask in black
- Twin eyepieces
- Side canister with built-in fan
- Fan helps reduce fogging
- Head straps to hold it in place
- Distinctive look for milsim, roleplay and cosplay
Compatibility
Fits over the whole face and is worn with or without a helmet. It is not designed to be worn over prescription glasses. Check your site’s eye protection rules, as no impact rating is stated on our listing.
Care and maintenance
Remove the battery after each game day. Wipe the inside and outside with a damp cloth and mild soap, keeping water away from the fan, then let it dry naturally. Clean the eyepieces with a soft microfibre cloth to avoid scratches, and replace the mask if an eyepiece is cracked or badly scratched. Store it away from heat to stop the mask distorting.
Who is it for?
Ideal for players who want a dramatic, full-face look for milsim, roleplay, zombie or post-apocalyptic games, and for cosplay and photography.
Please note: this is a replica for airsoft and cosplay, not a working respirator, and offers no protection against gas, smoke or dust. Battery details are not stated on our listing. Always check your site’s eye protection rules.









