Description

The Sea to Summit Ether Light XT Extreme L is a premium insulated sleeping mat built for cold ground and demanding conditions. With a generous 10cm thickness and advanced multi-layer insulation, it delivers serious warmth and comfort for winter and high-altitude use.

The Air Sprung Cell™ construction distributes weight evenly across hundreds of individual support cells, creating a stable, mattress-like feel rather than the typical bouncy air pad sensation. The Large size offers extended length and width for taller or broader campers without compromising packability.

For winter wild camping in Spain’s mountain regions or cold-weather trekking across Europe, this mat prevents ground chill from draining body heat — a critical part of any serious sleep system.

Key Features

• High-insulation winter-rated sleeping mat
• Air Sprung Cell™ construction for stable comfort
• 10cm thickness for superior support
• Large size: 198 x 64 cm
• Multi-layer insulation reduces heat loss to the ground
• Durable nylon fabric for rugged terrain
• Compact pack size for cold-weather trekking

Specifications

• Brand: Sea to Summit
• Model: Ether Light XT Extreme L
• Size: Large
• Dimensions: 198 x 64 cm
• Thickness: 10 cm
• Weight: Approx. 950 g (2.09 lb)
• Material: Durable nylon compound
• Season Rating: Winter / Extreme Cold

Included

• Stuff sack
• Integrated valve system
• Repair kit

Use & Care

• Inflate using pump system to reduce internal moisture
• Clear sharp debris before pitching
• Dry fully before storage
• Store loosely where possible to extend lifespan

Good to Know

This mat is designed for cold-ground conditions and should be paired with a properly rated winter sleeping bag. In colder mountain environments, ground insulation is as important as bag temperature rating.