What Should You Wear Inside a Hyperbaric Oxygen Chamber?
In this guide, we'll explore the recommended clothing, prohibited items, material considerations, and patient safety protocols for your HBOT sessions—ensuring maximum comfort and safety.
Inside a hyperbaric chamber, oxygen concentration is significantly higher than in normal air. This increases the risk of flammable incidents and static electricity. Therefore, clothing choices must align with strict fire safety and material compatibility regulations.
According to Cleveland Clinic, all patients must wear 100% cotton garments and avoid personal items during treatment. This precaution minimizes fire risk and potential discomfort caused by synthetic fabrics.
Most HBOT facilities provide patients with hospital-issued gowns or scrubs made of 100% cotton. These garments are: Flame-resistant
Breathable and hypoallergenic
Free from static electricity buildup
Patients should always wear the provided clothing unless otherwise instructed by medical staff.
If allowed to wear your own clothes (which is rare), ensure they are: 100% cotton
Free of synthetic blends or metallic elements
Loose-fitting for optimal circulation
Avoid anything tight, restrictive, or compression-based.
Synthetic materials like nylon, polyester, and spandex are strictly prohibited. They are highly flammable in oxygen-rich environments and can generate static, which is hazardous.
As noted by Johns Hopkins Medicine, avoiding synthetic clothing is a non-negotiable safety measure.
Skin creams, perfumes, hairsprays, and even deodorants may contain petroleum or alcohol-based ingredients, which are flammable. Before entering the chamber, shower thoroughly and avoid applying any topical products.
Metallic objects can cause sparks or burns and are not allowed inside the chamber. Remove the following: Rings, earrings, and bracelets
Hairpins or metal zippers
Watches and electronic devices
These items can also interfere with oxygen flow and chamber pressure.
Every medical center has slightly different protocols. However, the overarching guidelines are similar and revolve around patient safety and treatment efficacy.
Before treatment, patients undergo a safety screening to ensure they are not carrying prohibited items. You may be asked: If you have electronic implants (e.g., pacemakers)
Whether you've used hair or skin products that day
If your clothing meets safety standards
Failure to comply can result in session delays or cancellation.
The FDA has approved HBOT for several conditions but highlights the importance of strict chamber protocols to prevent fire hazards or contamination.
You may wonder if you can bring a phone, book, or blanket for comfort. The short answer is: usually no. Here's why: Item Allowed? Reason Electronic devices ❌ Fire/electrical hazard Blankets (non-cotton) ❌ Material may be flammable Cotton towels (facility-provided) ✅ Safe and approved
For longer sessions, entertainment options like facility-approved music players may be offered outside the chamber.
Children undergoing hyperbaric oxygen therapy must follow the same clothing regulations as adults. However, additional precautions may include: Parental accompaniment in some chambers
in some chambers Cotton toys (no synthetic stuffing)
Baby-safe monitoring equipment
Medical staff ensure a child-friendly and safe environment while adhering to HBOT protocols.
Before heading to your appointment, use this quick checklist:
✅ Wear only 100% cotton clothing (if permitted)✅ Remove all jewelry and metallic accessories✅ Do not apply lotions, deodorants, or perfumes✅ Do not bring lighters, matches, or electronic devices
✅ Inform staff of implants or hearing aids
For more details on what to expect during treatment, refer to our HBOT experience guide.
Yes, but only if they are 100% cotton and approved by facility staff. Some clinics may ask you to change into provided garments entirely.
Usually yes—provided they are made of cotton and free of elastic materials.
Most facilities discourage this due to strict safety protocols. However, if allowed, ensure they are cotton, tagless, and loose-fitting.
Dressing appropriately for hyperbaric oxygen therapy is about much more than comfort—it's about safety and compliance. By following these simple yet strict wardrobe rules, you can make your HBOT sessions smooth, effective, and risk-free.
When in doubt, always consult your facility's specific guidelines and let the staff guide you through the safest preparation process.
For further reading, explore the FDA's guidance on HBOT safety and Cleveland Clinic's patient resources.
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