SKU: 32459945296

Sea To Summit Ether Light XT Extreme ASC Mat Large

Sale price$202.02 Regular price$224.47
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Ships within 48 hours · Estimated delivery Sep 8 - Sep 13

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Description

Sea To Summit Ether Light XT Extreme ASC Mat LargeWith an R value over 6, the 10cm thick EtherLightXT Extreme air mat redefines lightweight sleeping comfort for winter adventures around the globe. Sea to Summit's Air Sprung Cells are the reason you will sleep better on this air mat. Each Air Sprung Cell deforms independently and allows the mat to conform to your body shape. This provides support and comfort by more evenly dispersing pressure across the mats surface. For the extra thick (XT)

With an R-value over 6, the 10cm thick EtherLightXT Extreme air mat redefines lightweight sleeping comfort for winter adventures around the globe. Sea to Summit's Air Sprung Cells are the reason you will sleep better on this air mat. Each Air Sprung Cell deforms independently and allows the mat to conform to your body shape. This provides support and comfort by more evenly dispersing pressure across the mat’s surface. For the extra thick (XT) EtherLight design, many TPU loops are used to connect the top and bottom fabric layers to the Air Sprung Cell dot weld pattern. These loops allow the top and bottom layers to be positioned further apart which creates larger pockets of air when inflated—perfect for side sleepers. This design also requires less fabric overall which means great stability and comfort for less weight. Dual-density layers of THERMOLITE® insulation fill the Air Sprung Cells and work together to prevent convective heat transfer and boost warmth while remaining lightweight and packable. When the mercury drops, the EtherLightXT Extreme’s 6.2 (women’s 6.3) ASTM R-value will keep you cushioned and insulated from the cold hard lumps and bumps beneath.

FEATURES

  • ASTM R-value 6.2 is designed for cold-weather use
  • Dual-density layers of THERMOLITE® insulation
  • Extra thick (XT) Air Sprung Cell construction for 10cm stable comfort
  • Lightweight, quiet and grippy 30/40D Nylon face fabric
  • Field repairable with included self-adhesive patches
  • Ultra-Fresh® anti-microbial treatment added to the TPU formula prevents internal mould growth
  • Pillow Lock attaches an Aeros pillow to mat
  • Quick and easy inflation, deflation and adjustment with the multi-function, high flow-rate valve and supplied Airstream Pump Sack

TECH SPECS

Weight

L: 950g

Dimensions

L: 10 x 64 x 198cm

Material

Mat Fabric: 100% Nylon with TPU Lamination
Valve: 100% TPU
Valve Flap: 100% Silicone
Stuff sack: 100% Nylon

Packed dimensions

L: Ø18.5 x 28cm

Thickness

10cm

R-value

6.2

MENTION IN THE COMMENTS IN THE CHECKOUT SECTION THAT YOU ARE A CADET AND WE WILL THROW IN A FREE GIFT FOR ORDERS OVER $50

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 32459945296

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4.5 ★★★★★
Based on 29 reviews
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Anna Wylda
Louisville, US
★★★★★ 5
They stay out! No more sock wads!
Size: Medium, Color: (100) White / White / Mod Gray
Best no show socks ever made!!!!! I've been struggling for 2 years to find ones that actually stay on your foot, even other national brands, and I just became content wearing my sneakers without socks. They ALWAYS slid down into my show & I ended up walking on a wad of sock until I could fix it...or usually just took them off after a couple of tries. Enter Under Armor!!! They a mid weight, but not very thick & still breathable. They work too by actually staying on your foot! Not once have they slid down into my show!! Very comfortable but they could be a little more affordable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 1, 2025
R
Verified Purchase
Rebekah
New York, US
★★★★★ 5
Love!
Size: Large, Color: (100) White / White / Mod Gray
Ive tried so many no show socks but I love these. This is the 3rd set I've bought. They never slip off and the material is thin and breathable. Perfect for working out.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
B
Verified Purchase
Becky
Chelsea, US
★★★★★ 5
True no-show socks that don’t slide down!
Size: Medium, Color: (100) White / White / Mod Gray, Size: Medium, Color: (100) White / White / Mod Gray
This is the first pair of no-show socks I’ve tried that actually don’t slide down into my shoes. Trust me… I have tried lots of different pairs and this is the one! They fit perfectly. They’re not too thick and they’re obviously durable because I wash them after each wear, so daily.
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Reviewed in the United States on March 21, 2026
R
Verified Purchase
Raquel Hall
Alexandria, US
★★★★★ 4
Great fit but expensive
Size: Medium, Color: (252) Blush Beige / White / Castlerock
These are really great socks. I love them, but they are definitely pricey.
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Reviewed in the United States on March 30, 2026
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LacyConner
Lowell, US
★★★★★ 5
Great socks!
Size: Medium, Color: (252) Blush Beige / White / Castlerock
Love these socks so much I got a second package. I like how thin and airy they are and they never slide down my heel. For thin socks they’re pretty durable.
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Reviewed in the United States on August 16, 2025

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