AEIR CO₂ Complete: Full-Body Flex Kit
Full-body CO₂ therapy. At home.
Or ~$240/month at 0% APR with Affirm. Includes an empty 5 lb CO₂ tank.
30-day satisfaction guarantee · Free US shipping · Affirm financing available
30 minutes. No appointments. No pain. No downtime. CO₂ opens your blood vessels. Oxygen reaches the tissue that needs it. That's recovery.
30-day satisfaction guarantee · Free US shipping · Affirm financing available
20–30 minute session
Arms free throughout
In your living room
No clinic required
Full-body Bohr Effect
Systemic oxygen delivery
Household-shareable
Multiple sizes available
20–30 minute session
In your living room
Full-body Bohr Effect
Household-shareable
Peer-reviewed science
What You Get
Everything you need. In one box.
The Flex suit
Full-body coverage with an extra-large diagonal zipper and arm-access cuffs. Sit. Read. Text. Recovery shouldn't put your life on pause.
CO₂ filling kit
Regulator, filling gun, USB-C vacuum, and seals. Vacuum the suit. Fill with food-grade CO₂. Seal. Takes about 2 minutes once you've done it three times.
Enhancing hydrogel (250mL)
Apply to your skin before you zip up. It helps the CO₂ soak in and triggers the Bohr Effect — the moment your blood lets go of oxygen where your tissue needs it. One bottle covers 20–30 sessions.
Also included: an empty 5 lb CO₂ tank (CGA-320), onboarding guide, storage bag, and a supplier locator. Refills run $15–$31 at any welding-supply, homebrew, or beverage-gas shop.
Watch the 6-Minute Walkthrough
From box to recovery in under ten minutes.
Ross walks you through every step. Hydrogel. Zip. Vacuum. Fill. Sit. By session three, you'll have it down to five minutes. Built to be repeatable — not to be impressive.
Shop the Flex Kit — $2,799VIDEO EMBED
FLEX_HOWTO_VIDEO_6MIN — Chad-produced;
6-minute Flex Kit walkthrough with Ross.
Upload to Shopify Files or Vimeo.
The Mechanism
What happens in thirty minutes.
Your blood vessels open.
CO₂ passes through your skin and opens the blood vessels below it — everywhere the suit covers. Thermal imaging proves it happens after one session.
Oxygen goes where your tissue needs it.
Higher CO₂ changes how your blood holds oxygen. Your blood lets go of O₂ into muscle, joint, and skin — all at once. This isn't more oxygen. It's oxygen reaching the places that need it.
You sit still. Your cells don't.
No electricity. No willpower. Twenty minutes on your couch is a full recovery session. Read, text, watch, breathe.
Who It's For
Built for people who take recovery seriously.
Competitive athletes
Training 5–6 days a week.
Compression boots. Massage guns. PT. Good tools. None of them deliver oxygen to tissue. The Flex Kit does. It's what serious athletes use between games.
The finisher
Finish everything with this.
Use it after your workout. Use it on the injury. Use it before you sleep. It's the one recovery tool that works with everything else — because nothing else delivers oxygen directly to the tissue.
Post-surgical / chronic
Healing needs circulation.
Circulation is what limits how fast you heal. The Flex Kit opens it up — whole body. Use it after surgery or during long-term recovery. Run it by your clinician first.
The household
One system. Everyone benefits.
Built for shared use. Multiple sizes. Everyone applies their own hydrogel. One purchase. Whole household recovers on it.
The Research
Not a theory. A research literature.
Peer-reviewed
Bone healing accelerates.
In animal studies, CO₂ therapy sped up bone healing. Dose and time mattered — which is why the Flex session is 20 to 30 minutes, not more.
Effects of the duration of transcutaneous CO₂ application on fracture repair.
Peer-reviewed
Muscle injuries repair faster.
In animal studies, muscle injuries healed faster with CO₂ through the skin. Measured in the tissue — not just how it felt.
Transcutaneous carbon dioxide application accelerates muscle injury repair.
Peer-reviewed
Mitochondria respond.
In animal studies with blood-sugar problems, CO₂ therapy brought muscle energy back. The cells started producing again.
Transcutaneous carbon dioxide attenuates impaired oxidative capacity in skeletal muscle.
Peer-reviewed
The body moves toward homeostasis.
CO₂ therapy moves your body toward balance. That's the opposite of ice baths and hard workouts — those push your body into stress.
How Therapeutic CO₂ Moves the Response toward Homeostasis.
Ross Schilling, founder of AEIR
From Ross — Founder, DC
The suit is the clinical experience. I just took it out of the clinic.
For ten years in my practice, a 45-minute CO₂ session was the treatment I reached for first with my serious athletes. NHL, NFL, the guys whose schedules don't allow a slow recovery. It worked in a way nothing else I had access to did.
The Flex is that session, re-engineered for your living room. Same mechanism. Same physiology. Same result — on your couch, with your arms free, twenty minutes while you answer emails.
There is no shortcut I know of that gets oxygen to the tissue that needs it faster than this. — Ross
Athlete Proof
NHL player in Flex suit
(no team logo)
"I've tried every recovery tool a locker room has. This is the first thing that made my legs feel like mine again at 36. Thirty minutes a day. That's it."
NHL forward, 15-season veteran (clearance pending)
Quote Draft — Approval NeededBrian Kula in Flex suit
"I tell every retired player I know. The CO₂ suit isn't a gadget. It's training-camp-level recovery at home."
Brian Kula NFL advocate (clearance pending)
Quote Draft — Approval NeededJason Pohl in Flex suit
at Ironman training
"Between the bike block and the run block, I'd stall out. The suit is how I stack two key sessions on the same day and not lose the week."
Jason Pohl Ironman athlete
Quote Draft — Approval NeededMike Barwis / Barwis Methods
"We put the suit into our training protocol when we saw the physiology. The numbers are not subtle."
Mike Barwis Performance coach
Quote Draft — Approval NeededCompare
Pick the starting point that matches you.
Both are built around the same suit. The difference is whether you need the turnkey setup or you already own the filling system.
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Flex Kit — $2,799
Recommended
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Flex suit only — $2,199
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Weekly Rental — from $249
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| Who it's for | First-time buyer. Turnkey. | Owner of an existing AEIR filling kit who wants a second/upgraded suit. | Trial, trip, or a specific training block. Credit toward purchase within 60 days. |
| Includes | Suit + filling kit + 250mL hydrogel + onboarding | Suit only | Suit + filling kit + hydrogel + return label |
| Ready to use | Yes — tank, suit, and hydrogel included | No — requires filling kit + hydrogel sold separately | Yes — turnkey for the rental period |
| Best for | New buyers, households, gifts | Upgrade path | Try-before-buy, road trips, event blocks |
| Cost per session (3×/wk, yr 1) | ~$17.94 | ~$14.10 (before accessories) | varies — rental credits apply toward purchase |
Logistics
What to know before you buy.
Shipping
3–5 business days from the U.S. warehouse. Free standard shipping on the Flex Kit.
CO₂ tank
Included — an empty 5 lb CGA-320 CO₂ tank ships with every kit. Refills are food-grade CO₂, the same gas used in restaurants and home carbonation. Available at welding supply, homebrew, and beverage-gas shops. Typical refill cost: $15–$31. We include a supplier locator.
Warranty
12-month manufacturer's warranty on the suit and filling kit. Hydrogel covered for labeled shelf life.
Returns
30-day satisfaction guarantee on unused kits in original packaging. Opened hydrogel non-returnable for hygiene reasons.
Electricity during use
None. The USB-C vacuum charges between sessions; during the session itself, the suit is passive.
Questions
Flex Kit — answered.
Lower the Risk
Not ready to own? Three ways in.
Start with the paste — $99
CO2 Renew 5-Pack. Same Bohr Effect, localized. Under $3 per treatment.
Shop the paste — $99Book a session — $75
45-minute session at our Long Lake, Minnesota facility. Session cost credits toward purchase within 60 days.
Book a sessionRent the full kit — from $249
1 week, 1 month, or a trip. Turnkey. Rental cost credits toward purchase within 60 days.
Start a rental
Thirty minutes. Full-body. In your living room.
Includes an empty 5 lb CO₂ tank. 30-day satisfaction guarantee. Affirm financing available.
AEIR Full-Body Flex Kit
$2,799 · or $240/mo with Affirm