Hard-Shell vs. Soft-Shell Hyperbaric Chambers: What's the Difference?

If you've started researching hyperbaric oxygen therapy, you've probably noticed that chambers look very different from place to place. Some are long, inflatable tubes. Others are rigid capsules with round doors and viewing windows.

Those differences aren't just cosmetic. The type of chamber affects pressure, comfort and the overall experience.

Here's a clear breakdown of hard-shell vs. soft-shell chambers and why iCRYO Daniel Island chose the hard-shell OxyHealth Fortius 420.

New to HBOT? Start with What Is Hyperbaric Oxygen Therapy?

First, a Quick Word on Pressure

Hyperbaric pressure is measured in atmospheres absolute (ATA).

• 1.0 ATA is the normal air pressure around you at sea level
• Higher ATA means more pressure inside the chamber

Why it matters: higher pressure helps more oxygen dissolve into your blood plasma. That's the core idea behind hyperbaric therapy. Read Hyperbaric Chamber vs. Supplemental Oxygen.

What Is a Soft-Shell Chamber?

Soft-shell chambers, sometimes called mild hyperbaric chambers, are made of flexible, reinforced fabric. They inflate as they pressurize.

What to know:

• Commonly operate around 1.3 ATA
• Lighter and portable, so you'll often see them in homes and wellness studios
• Usually entered through a zippered opening
• You typically lie in a tube-shaped space

What Is a Hard-Shell Chamber?

Hard-shell chambers are rigid, pressure-rated vessels. They don't inflate. They're built to hold their shape under pressure.

What to know:

• Generally designed for higher pressures than soft-shell chambers
• A rigid structure with a sealed door instead of zippers
• Often feature large viewing windows
• Built for durability and consistent pressurization

Side-by-Side Comparison

Why iCRYO Daniel Island Uses the Fortius 420

The OxyHealth Fortius 420 is a steel hard-shell chamber with a roomy 42-inch interior, rated by the manufacturer for up to 3.0 ATA (29 psi) operating pressure. That range gives our providers flexibility to set the right pressure for each client.

It also has a large round door you can sit in to get settled and a viewing window, so you're never sealed off from the room. Our team can see you and stay with you throughout your session.

Many clients tell us the rigid, open-feeling design is easier to relax in than they expected, especially if they were nervous about feeling closed in.

What a Hard-Shell Session Feels Like

1. Screening. We review your health history before your first session.
2. Settle in. Sit in the round doorway, then lie back on the cushioned bed inside.
3. Pressurization. As pressure builds, your ears may feel full, like on a plane. Swallowing or yawning helps, and we can slow the pace.
4. Relax. Read, watch something on your tablet, listen to music or nap.
5. Depressurization. Pressure slowly returns to normal before the door opens.

Who Should Talk to a Provider First?

Tell us if you have a cold, sinus or ear problem, lung conditions, are pregnant, are claustrophobic or have certain medical devices or conditions. We'll screen you before your first session and set the right pressure for you.

Does Chamber Type Change Your Results?

Pressure is one factor in what people experience, but your goals, consistency and overall health matter too. See Hyperbaric Oxygen Benefits and How Many Hyperbaric Sessions Do You Need?

Want to see the chamber for yourself?

Hyperbaric Oxygen in Charleston, SC

iCRYO Daniel Island is at 866 Island Park Dr Unit 101c, Charleston, SC 29492, on Island Park Drive on Daniel Island with free on-site parking. We welcome clients from Mount Pleasant, downtown Charleston, North Charleston, Cainhoy, Hanahan and Goose Creek.

• See our current intro offers
• Book your intro visit
• Get your free personalized wellness plan

Questions? Call (843) 972-8547.