What to Wear in a Hyperbaric Chamber: Essential Clothing Tips for Safety and Comfort

What to Wear in a Hyperbaric Chamber: Essential Clothing Tips for Safety and Comfort

When preparing for a session in a hyperbaric oxygen therapy (HBOT) chamber, one of the most common questions patients ask is about proper attire. The simple answer: you must wear 100% cotton clothing, free from synthetic fibers, metals, or flammable materials. This no-compromise rule is rooted in strict safety protocols, as the pressurized, oxygen-rich environment poses serious fire risks. But getting it right involves more than just grabbing any cotton T-shirt. This guide will walk you through everything you need to know about What To Wear In A Hyperbaric Chamber, from head to toe, ensuring both your safety and your comfort throughout the treatment.

The Golden Rule: 100% Cotton or Bust

The primary reason for the cotton-only rule is safety. Synthetic fabrics like polyester, nylon, and spandex can generate static electricity. In a chamber where oxygen levels are elevated to 100%, even a tiny static spark can ignite a fire. Cotton, on the other hand, is a natural fiber with low electrostatic potential, making it the safest choice. Avoid clothing with zippers, snaps, buttons, or any metal parts, as these can also create sparks. Your entire outfit, from top to bottom, should be simple, loose-fitting, and free of any non-cotton components.

What to Wear on Your Torso: Shirts and Tops

For your upper body, choose a plain, frontless, and pocketless 100% cotton T-shirt. Avoid tops with collars, hoods, graphics, or any plastic prints. Hospital-approved surgical scrubs made of cotton are an excellent option. Ideally, the shirt should be loose to avoid restricting breathing, but not so oversized that it bunches up. Long sleeves are sometimes permitted, but check with your facility first. For colder chambers, a thin cotton sweater or hoodie might be allowed, but make sure the drawstrings are removed.

What to Wear on Your Legs: Cotton Pants and Shorts

Standard 100% cotton sweatpants or pajama bottoms are perfect. Ensure there is no elastic cuff, drawstring, or pocket lining made of synthetic materials. Hospital-provided cotton scrub pants are also a safe choice. If you prefer shorts, ensure they are loose and have no zipper or button. Girls and women should avoid leggings or yoga pants unless they are certified 100% cotton leggings, which are rare. The rule to remember: no compression wear or activewear of any kind.

Footwear: Socks, Not Shoes

Shoes are strictly prohibited inside the chamber due to risk of contaminants and static charge. You will need a pair of 100% cotton socks. Avoid socks with synthetic toe seams or elastic bands that may contain rubber or nylon. Some facilities provide disposable cotton sock-like foot covers, but if you bring your own, wash them first. If the floor of the chamber is cold, a pair of well-worn cotton slippers may be allowed if they have no rubber sole.

Underwear: A Hidden Compliance Concern

Underwear can be a sneaky source of synthetic fibers. Both men and women should choose 100% cotton underwear. For women, check that bras are made either of cotton or are underwire-free. Most modern bras contain polyester, so a cotton sports bra is a safer bet. In many clinics, if your underwear contains synthetics, you will be asked