Insulated Sleeping Mat EXTREME (R8)

ENGINEERED TO EXCEL IN EXTREME CONDITIONS

The Alton Insulated Sleeping Mat EXTREME (R8) is built to handle unrelenting cold in demanding winter conditions. Featuring five layers of heat-reflective aluminised film suspended between 10cm thick air-cell cushioning, it has a wider-than-standard 67cm profile for superior warmth and ground coverage. 

Inflation System

  • Ships in 24 hrs

  • Easy Returns

  • Lifetime warranty*

Frequently bought together

ALL ALTON PRODUCTS ARE COVERED BY A LIFETIME WARRANTY.* CLICK HERE TO LEARN MORE.

ALL ALTON PRODUCTS ARE COVERED BY A LIFETIME WARRANTY.* CLICK HERE TO LEARN MORE.

ALL ALTON PRODUCTS ARE COVERED BY A LIFETIME WARRANTY.* CLICK HERE TO LEARN MORE.

ALL ALTON PRODUCTS ARE COVERED BY A LIFETIME WARRANTY.* CLICK HERE TO LEARN MORE.

Explore Product Features

ASTM-Tested Insulation

ASTM-Tested Insulation

With an ASTM F3340-22 certified R-value of 8.8, the Insulated Sleeping Mat EXTREME excels in scenarios where most mats would fail.

Heat-Reflective Foil Technology

Heat-Reflective Foil Technology

The diamond-shaped baffles suspend 5 layers of heat-reflective film that actively bounce your body heat back towards you for maximum thermal efficiency.

Extra-Wide & Comfortable

Extra-Wide & Comfortable

Wider than most sleeping mats on the market, the 67cm width and 10cm thick air-cell cushioning provides a larger, more comfortable sleeping surface and is more effective in cold conditions.

Low-Noise TPU Materials

Low-Noise TPU Materials

The Insulated Sleeping Mat EXTREME is made with high-quality materials that make less noise when you shift position for a quieter, more restful night’s sleep.

Specifications

Mat Dimensions 197 L × 67 W × 10 cm H
R-Value (ASTM F3340) 8
Material RIPSTOP NYLON
Fill HEAT-REFLECTIVE ALUFILM
Weight (Mat only) 740g
Total Packed Weight 750g
Packed dimensions 25 × 13 × 13 cm
Mat Dimensions 77.5 L × 26.5 W × 4 in H
R-Value (ASTM F3340) 8
Material RIPSTOP NYLON
Fill HEAT-REFLECTIVE ALUFILM
Weight (Mat only) 1lb 10.1oz
Total Packed Weight 1lb 10.5oz
Packed dimensions 10 × 5 × 5 in

What's included

1 × INSULATED SLEEPING MAT
1 × DRAWSTRING CARRY BAG
2 x ADHESIVE REPAIR PATCHES

High-Performance Insulation

When the temperature drops and the ground pulls heat from your body, the mat you’re sleeping on matters as much as the bag you’re sleeping in. That’s where Alton’s Insulated Sleeping Mat EXTREME comes in. Made with five layers of heat-reflective aluminised film suspended between 10cm thick air-cell cushioning, it creates an efficient thermal barrier that actively reflects heat back towards you for optimal warmth retention in freezing conditions.

Wider, Thicker, Warmer

The Insulated Sleeping Mat EXTREME is ideal for winter or alpine environments, expedition base camps, and any other conditions where insulation is essential. The wider profile provides better ground coverage, reducing the cold ingress that happens at the edges of narrower mats, while the 10cm cushioning delivers optimal comfort throughout the night, so you stay warm and supported from the moment you lie down to the moment you wake.

Reliable Construction & Durability

Every aspect of Alton’s Insulated Sleeping Mat EXTREME (R8) has been meticulously designed and constructed to deliver the best sleeping experience. High-quality 20D ripstop nylon shell resists damage from punctures, abrasion and extreme temperatures, ensuring longer-lasting performance in harsh wilderness conditions. Like all our mats, the Insulated Sleeping Mat EXTREME utilises our low-profile micro-adjustable valve for easy inflation and individualised comfort. 

Responsibly Made, Independently Certified

At Alton, we’re committed to rigorous quality standards across every step of production. Our R8.8 Sleeping Mat is manufactured in a factory certified to ISO 9001 for quality management and ISO 14001 for environmental management, two of the most rigorous internationally recognised standards in production. Independently tested to the ASTM F3340-22 standard, it is certified to have an R-value rating of 8.8, meaning it can be relied upon to perform in even the most extreme conditions.

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