Spirit Halloween’s official A24 Backrooms costumes are out of stock to ship on SpiritHalloween.com. As of October 20, all four pieces, a Captain Clark costume, the Green and Yellow Async hazmat suits, and an Async gas mask, showed out of stock for shipping in every size, at prices from $12.99 to $59.99. Each product page still offers a check of nearby Spirit stores for in-store pickup.
Captain Clark is No. 11 on Google’s 2026 Frightgeist list of trending Halloween costumes, where a peg leg is the top trending product searched with the costume, in my story on Google’s top trending costumes.
On October 13, Spirit’s Backrooms page listed no kids’ sizes: the Captain Clark costume and both Async hazmat suits are sold as adult costumes, rated for ages 14 and up.
The Four Backrooms Costumes and Their Prices
- Adult Captain Clark Costume ($59.99): the character look, with a long-sleeve shirt and oversized collar, a vest, pants, a belt, and Captain Clark’s signature hat. Shoes are not included, and it is rated for ages 14 and up.
- Adult Green Async Hazmat Suit ($54.99): a neon green polyester jumpsuit with long sleeves and a zipper closure, plus matching gloves. The mask and shoes are not included. Ages 14 and up.
- Adult Yellow Async Hazmat Suit ($54.99): the same jumpsuit-and-gloves set in bright yellow. The mask and shoes are not included. Ages 14 and up.
- Async Gas Mask ($12.99): a detailed plastic mask with an adjustable elastic strap, one size fits most. It is the piece that finishes either hazmat suit.
What the Hazmat Suits Look Like
The two Async suits are the ones most Backrooms fans will be after, modeled after the hazmat-suited crew from the series. Each is a full hooded jumpsuit, in neon green or bright yellow, with a clear face window, a zipper closure, and gloves, though you add the Async gas mask separately to complete the look. All four pieces are officially licensed, and Spirit lists the suits with a latex-allergy warning and a spot-clean care note.
The gas mask is sold separately at $12.99, so a full suit-plus-mask look runs about $68 before any shoes.
About the Backrooms
The Backrooms began online as a series of short horror videos set in an endless maze of empty rooms, and A24 has turned it into a film that began streaming on HBO Max on September 25. I covered everything to know about the Backrooms coming to HBO Max. With the movie streaming now, the Async hazmat suits are about the most on-theme costume a Backrooms fan could pull on this Halloween.
Where to Buy
The costumes are sold at SpiritHalloween.com, and stock and pricing can change through the season. They are also turning up in Spirit Halloween stores, so if you would rather shop in person, check your nearest shop on the Spirit Halloween store locator. A yellow Backrooms hazmat suit is in the images Spirit released with its list of 11 costume trends for 2026, and my Spirit Halloween costumes guide has the full list with prices.
