Sleeping mat Therm-a-Rest NeoAir XTherm NXT Regular Wide — Insulation R-value 5.7

Therm-a-Rest NeoAir XTherm NXT Regular Wide is an insulated inflatable sleeping mat designed for cold-weather camping and mountaineering. With an advertised insulation R-value of 5.7, this sleeping pad combines an air-core structure and reflective thermal layers to reduce radiant and conductive heat loss while remaining lightweight and compact when packed. The Regular Wide profile offers extra usable surface area compared with narrower models, making it suitable for sleepers who want more room without a significant weight penalty.

Advantages

The NeoAir XTherm NXT Regular Wide delivers high thermal efficiency through its layered construction, giving reliable warmth in low temperatures while keeping bulk and weight low for backpacking and alpine travel. Its inflatable design allows for adjustable comfort and the pack size is small enough for multi-day treks. The wider sleeping surface improves comfort for side sleepers and those who prefer more movement space. Durable materials and a robust valve system support repeated inflations and deflations in field conditions.

Suitable for

• Cold-weather backpacking and winter camping
• Mountaineering and alpine expeditions where weight and warmth are critical
• Multi-day trekking with limited pack space
• Campers who need a wider sleeping surface without significant added bulk

When it may not be suitable

This insulated inflatable pad is designed primarily for low-temperature use; for warm-weather or car-camping where insulation is not required, a lighter or less insulated pad may be more cost-effective. Users seeking a permanently rigid foam pad or an ultralight minimalist pad with extremely lower weight may find other models better matched to those priorities.

Key specifications

• Thermal insulation: R-value 5.7
• Type: Inflatable sleeping mat with reflective thermal layer
• Size category: Regular Wide (increased sleeping surface width)
• Construction: Air-core with internal reflective insulation
• Packability: Compact when deflated for backpacking

How to use

Unroll the mat on a flat, debris-free surface and fully inflate using the integrated valve or a compatible pump/Inflation accessory until it reaches preferred firmness. Close the valve to prevent air loss. Position the mat under a sleeping bag or quilt to ensure proper thermal coupling with your sleep system. To deflate, open the valve and roll the mat tightly from the foot end to expel air; fold or roll to the smallest practical size for storage and transport. Inspect the mat for punctures before each trip and follow the manufacturer’s care instructions for cleaning and storage.

What to consider before purchase

• Required insulation level for your typical conditions — R-value 5.7 is intended for cold and winter use
• Desired width and sleeping surface — Regular Wide offers more room than standard widths
• Weight versus warmth trade-off for backpacking or alpine travel
• Compatibility with your sleeping bag and tent floor dimensions

Usage recommendations

Use a groundsheet or sleeping pad liner to protect the mat from sharp objects and dirt, and allow a short airing period after cold, damp nights to reduce moisture buildup. For maximum warmth, minimize air gaps between your sleeping bag and the mat and ensure the valve is fully closed during use.