Thermarest NeoAir XTherm NXT MAX Large Sleeping Mat

Jump to: Our Verdict / Features / Specifications

UOG TOP PICK – NeoAir XTherm NXT: It’s low weight, incredibly hight R-value, and durable materials, set this mat apart from its competitors, its “the best warmth-to-weight ratio of any sleeping pad ever created” so, it has to be one of our top pics!

Thermarest says: 

With cutting edge Triangular Core Matrix™ construction and ThermaCapture™ technology, the full-rectangular shaped XTherm NXT MAX delivers a 7.3 R-value while weighing just 24 oz (680 g) in the Large size. Put another way, the best warmth-to-weight ratio of any rectangular sleeping pad ever created. It is warmer, lighter and thicker than the previous model, which is why the XTherm NXT MAX cements the legacy of being the go-to rectangular sleeping pad for alpinists, mountaineers and extreme cold expeditions. At 3-inches thick, with horizontal baffles and the added sleep surface of the rectangular shape, all-night comfort and support are at hand, while 70D nylon on the bottom ensures the XTherm NXT holds up to extended expedition use. The WingLock™ Valve allows for rapid inflation and deflation but is also intuitive and easy to use in frigid weather when the gloves are not coming off. When you absolutely need to be warm no matter the weather, want plenty of sleep surface but space in the pack is at a premium, there is no finer sleeping pad than the XTherm NXT MAX.

Our Verdict

I much prefer a rectangular shape I always find that my legs have slipped off during the night on narrower mats, especially if I’m using a quilt. A rectangular mat will add some weight, but I’ll happily carry a few extra grams for a good night’s sleep. I’m a side sleeper and felt very comfortable and well-supported; it’s 7.63 cm thick, so you are well off the ground and well insulated.

Therm-a-rest have been listening to hikers feedback and have made this mat much, much quieter than in past seasons. It’s a much nicer mat to sleep on, and you won’t irritate your camp mates tossing and turning during the night.

The mat comes with its own pump sack; it took me about 10 pumps of the sack to fully inflate the mat.

The mat has an incredibly height R-value of 7.3, this is a mat that can be used in arctic conditions, and weighs only 694 grams, truly impressive.

– Reviewed by Ultralight Outdoor Gear

In-depth Reviews:

• Thermarest NeoAir XLite and XTherm Review – “Increased the comfort and thermal qualities making this the perfect option for lightweight wild-camping”

Features

• Best Warmth-to-Weight Ratio Ever: Refined Triangular Core Matrix construction and ThermaCapture technology deliver a cold-conquering 7.3 R-Value while cutting over 1 oz (28 g) in weight from the previous model.  
• Premium Comfort: A 3-inch (7.6 cm) thick profile, horizontal baffled structure and the added sleep surface of the rectangular shape deliver premium backcountry comfort while keeping the weight to a minimum.
• Ultralight Durability: 70D nylon on the bottom withstands the wear and tear of extended expedition use, while 30D ripstop nylon on top keeps it light and packable. 
• WingLock™ Valve: Delivers fast one-way inflation and rapid deflation without giving up the ability to easily purge air while you lay on it for comfort micro-adjustments—even with gloves on.
• Pump sack, stuff sack and field repair kit included.

Specifications

• Weight: 694g
• Pump Sack Weight: 57g
• Dimensions: 64 x 196 cm (25 x 77 in)
• Thickness: 7.62 cm (3 in)
• R-Value: 7.3

ASTM R-Value:

From 2020, there is a new industry standard for measuring the R-value (level of insulation) of sleeping mats – ASTM F3340-18. This new standard is the sleeping mat equivalent to the EN rating for sleeping bags.

You can now directly compare the R-value of mats rated using the ASTM F3340-18 with confidence that is a fair and accurate comparison between mats. In simple terms, the higher the R-value, the warmer the mat.

In general terms, an R-value below 2.0 is for summer use, 2.0 to 4.0 is for cooler 3 season use and 4.0+ is for winter temperatures. This will be also be dependent on your sleeping bag, how cold you sleep etc. Please contact our customer service team if you need advice on choosing the right mat for your activity.

Material & Construction

• 30D Nylon Ripstop Top
• 70D Nylon Bottom

Help & advice:

• The Ultimate Guide to Choosing an Ultralight Sleeping Mat
• Time-Saver Guide to Choosing a Sleeping Mat
• R-Value Explained
• About Thermarest
• Thermarest ‘Fast & Light’ Sleeping Mats Explained
• R-Value Explained
• About Thermarest
• Thermarest Sleeping Bags Explained
• Thermarest ‘Fast & Light’ Sleeping Mats Explained