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.
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 & 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)
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.
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)
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., RMI Expeditions Guide
Trust the experts
How Guide Pick™ Works
Step 1
The guides over at RMI collectively spend over 10,000+ days a year on the world's highest mountains, climbing hundreds of thousands of vertical feet. They put their gear and apparel through the wringer. This stuff is their work wear and they simply will not tolerate inferior gear.
Step 2
At the end of the climbing season, guides are given a survey to find out what gear they are using and why it is their favorite. We don’t often get complete agreement but we do get alignment and by looking at the data, a few clear winners rise to the top in each category.
Step 3
We take those winners, and stamp them with the Guide Pick™ logo on our site. We also compile this wonderful little document, which you can use to see top contenders, gear advice, Guide Quotes, and more.
This pad did exactly what I expected on a ski mountaineering trip to the top of Mt. Baker this weekend. Stayed consistently inflated all night (unlike the pad I was replacing), did not sound like I was lying on a bag of chips (like my other neo air), and kept me cozy in my bivy bag. It was the pad’s maiden voyage, but it was one of the best nights sleep in the alpine in the last few years!
A
ADrian BUie
Very disappointed.
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