Sea to Summit Air Seat
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Air Seat
Inflatable Cushion · Stadium · Festival · Travel
So packable you won't notice the addition to your bag, but so useful you'll never leave home without it. Using the same technology as our award-winning Air Sprung Cell Sleeping Mats, the Air Seat is the perfect way to add a little comfort to whatever you're sitting on — whether it's the ground, stadium, festival seat, bleachers, or any hard surface. Quick inflation and easy adjustment through the multi-function valve mean you get comfortable as soon as you have it out of the bag. Available in both a standard and an insulated version filled with THERMOLITE® insulation.
Toast-Sized Pack
Packs to 4 × 1 × 4 in (size of a piece of toast) — fits in jacket pockets, daypack lids, laptop bags.
Air Sprung Cell Comfort
Uses the same Air Sprung Cell technology as STS's award-winning sleeping mats — soft, supportive air pockets.
Fast Inflation
Multi-function low-profile mini-valve — 2-3 breaths to inflate, deflates in seconds.
Versatile Use
Stadium bleachers, festival seats, hard chairs, picnic benches, ground sitting, airplanes, anywhere you sit.
Durable Construction
75D Polyester face fabric handles regular sitting use — built for hard surfaces and repeated inflation cycles.
Self-Storage
Packs into its own zippered pouch — doubles as a small storage bag for the inflated cushion.
Air Sprung Cell Technology (NEW — CROSS-PRODUCT TECH)
The Air Seat uses the same Air Sprung Cell technology as STS's award-winning sleeping mats. Air Sprung Cell construction uses a matrix of small, interconnected air pockets (rather than a single large air chamber) — this gives a softer, more cushioned feel than a flat air bladder. The same tech that makes STS sleeping mats comfortable for side sleepers also makes the Air Seat comfortable for stadium and bleacher sitting.
75D Polyester Face Fabric
The seat surface is made from tough and durable 75D Polyester — heavier than the Airlite Towel's microfibre but appropriate for a load-bearing seat cushion. 75D handles regular sitting use without abrasion or wear, and resists punctures from rough surfaces (concrete bleachers, rocky ground, wood benches).
Multi-Function Low-Profile Mini-Valve
STS's multi-function low-profile mini-valve (same family used in the Traveller pillows) — a one-way intake that opens on the inhale, with a wide-deflation port for fast pack-down. Low profile means the valve doesn't dig into your thigh or buttock when seated. 2-3 breaths inflate the Air Seat to full firmness.
Self-Storage Zippered Pouch
The Air Seat packs into its own zippered pouch — the pouch is part of the cushion itself, not a separate stuff sack. When inflated, the pouch zips shut around the cushion to keep it compact during use (or doubles as a small storage bag). When deflated, the cushion folds into the pouch for transport.
Available in Insulated Version (NEW — THERMOLITE®)
The Air Seat comes in two versions:
- Standard (this one, $42.95): No insulation. Just the Air Sprung Cell cushion.
- Insulated ($49.95): Same cushion with THERMOLITE® insulation layered in — adds warmth for cold bleachers, frozen stadium seats, or winter camping. THERMOLITE® is a synthetic insulation made by Invista (the same company that makes COOLMAX® and LYCRA®) — lightweight, quick-drying, and warm even when damp.
Use Cases
Versatile Cushioning
The Air Seat is designed for anywhere you'd otherwise sit on something hard:
- Stadium bleachers (primary use — adds 1-2 inches of cushioning to metal/wood bleachers)
- Festival seats (music festivals, sporting events, outdoor concerts)
- Hard chairs (cafes with wooden chairs, plastic lawn chairs, picnic benches)
- Ground sitting (picnics, camping, outdoor yoga)
- Airplanes (long-haul flights where seat comfort matters)
- Camping (around the campfire, on logs, on rocks)
- Outdoor events (graduations, weddings, parks)
Comparison to Other STS Seats
Inflatable vs Foam Sit Pads
The STS Seats & Chairs subcategory has three products:
| Product | Type | Weight | Price | Inflation |
|---|---|---|---|---|
| Air Seat | Inflatable cushion | 2.5 oz | $42.95 | Yes (multi-function valve) |
| Air Chair | Sleeping mat chair accessory | 9.2 oz | $74.95 | Requires sleeping mat |
| Delta SI V Seat | Self-inflating sit pad | ? oz | $36.95 | Self-inflating foam |
The Air Seat is the inflatable choice — smallest pack, lightest weight, requires breath to inflate. The Delta SI V Seat is the self-inflating choice — opens valve, foam expands automatically, slightly bulkier pack. The Air Chair is a different category entirely — converts a sleeping mat into a chair, requires the mat.
Best Use
Activity
Stadium sitting, festivals, camping, travel, airplane cushion, ground sitting, outdoor events, picnics
Materials & Construction
Seat Fabric
100% Nylon (75D Polyester face for durability)
Storage Pouch
100% Nylon (integrated zippered pouch)
Air Cell Technology
Air Sprung Cell (matrix of small interconnected air pockets)
Insulation (Insulated version only)
THERMOLITE® (Invista synthetic insulation)
Valve
Multi-function low-profile mini-valve (one-way intake + wide-deflation)
Dimensions & Weight
Weight
2.5 oz / 71 g
Packed Weight
2.8 oz / 80 g
Packed Size
4 × 1 × 4 in / 11 × 2 × 9 cm (toast-sized)
Inflated Dimensions
11 × 2 × 15 in / 28 × 5 × 38 cm
Versions
Standard (this one)
No insulation — $42.95
Insulated
THERMOLITE® insulation layer — $49.95
Compatibility
Use Cases
Stadium bleachers · festivals · hard chairs · picnic benches · ground sitting · airplanes · camping · outdoor events
Storage
Integrated zippered pouch — fits in any pocket, pack lid, or carry-on bag
Multi-Pack Compatible
Multiple Air Seats can be packed together for stadium groups (each person gets one)
Profile
Brand
Sea to Summit (Australian outdoor gear, founded 1994)
Category
Inflatable Cushion / Stadium Seat / Travel Seat
Activity
Stadium events, festivals, camping, travel, outdoor events
Season
Year-round (insulated version recommended for cold weather)
Cleaning
Wipe clean with a damp cloth and mild soap if needed. For tougher dirt, rinse with water and a soft brush. The 75D polyester face fabric can handle more aggressive cleaning than the Airlite Towel's microfibre. Air dry completely before long-term storage. Do not machine wash or tumble dry — can damage the Air Sprung Cell construction and the multi-function valve.
Drying
Air dry only. After any cleaning or exposure to moisture, fully deflate the Air Seat and hang or lay flat in a well-ventilated area. Do not tumble dry or expose to direct high heat — can damage the TPU bladder inside the cushion and the Air Sprung Cell welds.
Inflation & Deflation
To inflate: open the multi-function low-profile mini-valve, blow into the port (one-way intake flap lets air in without escaping), 2-3 breaths fills the cushion. To deflate: flip the valve cap to the deflation position — the wide port vents air rapidly. Always close the valve fully before use to prevent slow leak drift.
Valve Care
Keep the multi-function mini-valve free of debris — small particles can prevent the one-way flap from sealing properly, causing slow deflation during use. If the valve sticks or doesn't hold air, check for debris and rinse with clean water. Do not use lubricants on the valve mechanism — they attract dirt and gum up the sealing surfaces.
Air Sprung Cell Care
The Air Sprung Cell construction is a matrix of small, interconnected air pockets. To preserve the welds between cells: avoid over-inflation (the cushion should feel firm but not rock-hard), don't sit on sharp objects, and inspect periodically for signs of cell separation. If individual cells fail, the cushion will develop soft spots but can still be used (just less comfortable).
75D Polyester Care
The 75D polyester face fabric is durable enough for regular sitting use but not indestructible. Avoid contact with sharp objects (broken bleachers, sharp rocks, exposed screws on chairs) that can puncture or tear the fabric. For small punctures: clean the area, apply a TPU/polyester repair patch (STS repair kit or generic), and allow to cure for 12–24 hours before use.
Insulated Version Care (Insulated variant only)
If you have the insulated version, the THERMOLITE® insulation layer requires similar care to down or synthetic insulation: keep dry, air out after use to prevent moisture buildup, and avoid prolonged compression. Wet insulation loses loft and warmth; properly dried insulation recovers.
Storage
Store fully deflated, dry, and loosely folded in the integrated zippered pouch — don't compress tightly. The Air Sprung Cell welds can take a set if stored compressed for months, which may affect cushion feel. For long-term storage, occasionally inflate and reflate the cushion to "exercise" the cells and prevent permanent deformation.
Puncture Repair
The TPU bladder inside can be repaired with a Sea to Summit TPU repair patch (sold separately) or any TPU/polyurethane repair tape. Clean and dry the puncture area, apply the patch, and allow to cure fully (usually 12–24 hours) before re-inflating. Do not use silicone-based sealants on TPU — they won't adhere properly. Deep punctures or seam failures are not repairable and the cushion should be replaced.
Travel Tip
The Air Seat's 2.8 oz packed weight and toast-sized pack (4 × 1 × 4 in) make it a great always-pack cushion — keep it in your carry-on for long flights, your daypack for stadium events, or your car for unexpected hard seating. Per a verified buyer review: "It has single handedly solved my hamstring and butt pain on airplanes." A small weight and pack cost for dramatically improved sitting comfort.
Shipping Policy
Components:
All component items (wheels, drivetrains, suspension, brakes, etc.) ship within 2-5 business days of purchase.
Bicycles:
Complete bikes typically ship within 2–3 weeks due to build, tuning, and inspection times. You will receive tracking information as soon as your order is ready to ship.
Riding Gear & Apparel:
Riding gear and apparel orders (helmets, jerseys, gloves, etc.) ship within 2-5 business days.
Returns & Exchanges:
If you received the wrong size or wish to exchange an item, it must be returned in original condition—unused, uninstalled, and with all packaging intact.
For full details, please see our Refund Policy before initiating a return.
