Therm-a-Rest

NeoAir Xtherm NXT Sleeping Pad

Guide Pick™ Product

A 7.3 R-value ultralight sleeping pad with expedition-grade durability and three inches of cushion, warm enough for cold sleepers on Denali and packable enough for fast-and-light objectives.

$239.95 USD

Only 3 units left

Color: Neptune

Neptune

Size: Regular

Sizing: N/A

See Specs tab for Sizing Details

Regular Large

Quantity:

Ultralight Warmth for Extreme Cold

The Therm-a-Rest NeoAir XTherm NXT is the ultimate sleeping pad for mountaineering and alpine expeditions where warmth, weight, and durability can’t be compromised. At just 15.5 oz in the Regular size, it packs small yet delivers a 7.3 R-value—the highest warmth-to-weight ratio of any pad ever made. With 3 inches of thickness, horizontal baffles, and rugged 70D nylon on the bottom, the XTherm NXT is engineered to thrive in the world’s coldest and harshest conditions.

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Available For Rent

Pickup available at Whittaker Mountaineering

Usually ready in 24 hours

NeoAir Xtherm NXT Sleeping Pad

Neptune / Regular

Whittaker Mountaineering

Pickup available, Usually ready in 24 hours

30027 SR 706 E
Ashford WA 98304
United States

+18002385756

Therm-a-Rest NeoAir Xtherm NXT Sleeping Pad

$239.95 USD

Guide Pick Product

Diggin' in to Details

Our Take

The XTherm NXT is the definition of overbuilt for the ultralight category. It offers unmatched warmth for its weight, durability that stands up to dozens of expeditions, and comfort that helps guides and climbers actually recover between big days. If you’re headed into cold alpine terrain, this is the pad you want beneath you.

Guide Tip: Pair the XTherm with a lightweight closed-cell foam pad for extra protection and insulation on snow or ice. It not only boosts warmth but also provides a backup layer in case of punctures—essential peace of mind for serious expeditions.

Details & Features

Features

Best-in-Class Warmth-to-Weight: 7.3 R-value in a 15.5 oz package—the highest ratio ever achieved in a pad.
Ultralight & Packable: Packs down small for alpine objectives and cold-weather expeditions.
Premium Comfort: 3-inch (7.6 cm) profile with horizontal baffles for supportive sleep.
Durability: 70D nylon base withstands repeated use in rugged alpine environments.
Quieter Rest: Improved internal construction reduces noise from previous models.
WingLock™ Valve: One-way inflation and rapid deflation, easy to use even with gloves on.

Details

Includes pump sack, stuff sack, and field repair kit
Made in USA* of U.S. and global materials
Rectangular-tapered cut balances packability and comfort

Specs

Specs & Materials

R-Value: 7.3 (expedition-ready, extreme cold)
Thickness: 3 in (7.6 cm)
Weight: 15.5 oz (440 g) — Regular
Dimensions: Regular — 72 x 20 in (183 x 51 cm); Regular Wide — 72 x 25 in (183 x 64 cm); Large — 77 x 25 in (196 x 64 cm)
Packed Size: ~9 x 4 in (23 x 10 cm)
Top/Bottom Fabric: 30D rip HT nylon (top), 70D nylon (bottom)
Valve: WingLock™
Color: Solar Flare

Sustainability

Made in the USA with durable, long-lasting materials designed for repairability. Includes a field repair kit to extend product life.

Sizing

See Specs tab for Sizing Details

Guide Pick™

Straight From The Source

Why We Love It
Will Ambler

Guides pick the NeoAir XTherm NXT because it’s the warmest ultralight pad they can trust on serious climbs. With a 7.3 R-value, it keeps even cold sleepers comfortable on Rainier, Denali, and beyond, while still packing down small enough for fast-and-light missions. The 70D bottom fabric adds expedition-ready durability, and the 3-inch thickness makes it genuinely comfortable after long alpine days. For guides, it’s the only pad that delivers true winter warmth without the bulk.

“The Thermarest Neo Air XTherm NXT is the lightest pad on the market at it's insulation value. Sometimes when I'm having trouble falling asleep at home, I imagine I'm lying on my Thermarest Neo Air XTherm NXT and I fall right to sleep.”
— Will Ambler, RMI Guide

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Our Philosophy

We Simplify Outfitting

Whittaker Mountaineering was born out of the need for RMI to make sure their clients had the appropriate gear to get to the top of Mt. Rainier safely. After decades of trying, reviewing, arguing-over, and recommending gear, we can’t help but know what we’re doing by this point. We know what works, we know what doesn’t, and we use that expertise to stock our store.

Who are these guys?

Therm-a-Rest

Therm-a-Rest pioneered lightweight camping comfort with the first self-inflating pad and continues to lead with innovative, durable sleep systems. We carry them because their commitment to comfort, repairability, and long-term reliability makes them a trusted standard for mountaineers and backpackers alike.

See More From Therm-a-Rest

Best For

Alpinists, mountaineers, and cold-sleepers who need maximum warmth and durability in an ultralight pad.

Summits

Denali
Rainier (Seminar)
Aconcagua
Vinson

Activities

Mountaineering

What's the diff?

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Best For

Alpinists, mountaineers, and cold-sleepers who need maximum warmth and durability in an ultralight pad.

Ultralight backpackers, climbers, and mountaineers seeking the best balance of warmth, weight, and comfort.

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Summits

Denali
Rainier (Seminar)
Aconcagua
Vinson

Rainier (Seminar)
Baker

—

Activities

Mountaineering

Mountaineering
Backpacking

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