Sea to Summit Ether Light XT Extreme

Description

Sea to Summit Ether Light XT Extreme Sleeping Mat

For those who refuse to let freezing temperatures cut their adventures short, the Sea to Summit Ether Light XT Extreme Sleeping Mat is the ultimate solution.

Ultimate Warmth and Comfort for Cold-Weather Adventures

Designed to fill the gap at the upper end of insulated sleeping mats, this pad delivers exceptional warmth, comfort, and packability for winter camping, alpine trekking, and extreme cold conditions.

With an R-value of 6.2, this mat is built to handle frigid environments, preventing heat loss to keep you warm in sub-zero temperatures. At 10cm thick, it provides plush, body-conforming support while remaining impressively lightweight and compact—proving that winter insulation doesn’t have to mean bulk.

Engineered for Extreme Performance

• Dual-Density Thermolite® Insulation: Two layers of Thermolite® fill provide maximum heat retention while keeping the mat lightweight and packable. The updated construction ensures even insulation coverage, eliminating cold spots.
• Advanced Air Sprung Cells™ Technology: Unlike traditional baffles, these independent air pockets distribute pressure evenly across the surface, offering a more natural, mattress-like feel.
• Extra Thick (XT) Comfort: The 10cm height allows deep cushioning, preventing pressure points and keeping you insulated from the cold ground—even for side sleepers.
• Loop Baffle Construction: TPU loops connect the top and bottom fabric layers, allowing larger air pockets to form when inflated, maximizing stability and reducing weight.

Smart Features for Effortless Setup & Durability

• Airstream™ Pump Sack Integration: The included stuff sack doubles as a pump, allowing for quick, effortless inflation while minimizing moisture buildup inside the mat.
• Multi-Functional, High Flow Valve: Enables rapid inflation, fine-tuned adjustments, and quick deflation, making setup and pack-up hassle-free.
• 30D/40D Nylon Face Fabric: Lightweight yet durable, this quiet, grippy surface ensures a restful night’s sleep, even on uneven terrain. Field-repairable with self-adhesive patches for added reliability.
• Ultra-Fresh® Anti-Microbial Treatment: Embedded within the TPU material, this treatment prevents mold and bacteria growth, extending the lifespan of your mat.
• PillowLock™ System: Securely attaches to Aeros™ Pillows, preventing unwanted pillow movement for an uninterrupted sleep.

Available Sizes

Choose the size that best suits your needs, whether you’re looking for ultralight packability or maximum sleeping space.

Regular

• Dimensions: 183cm x 55cm x 10cm
• Rolled Size: Diameter: 14cm x Length: 24cm
• Weight: 782g

Large

• Dimensions: 198cm x 64cm x 10cm
• Rolled Size: Diameter: 15cm x Length: 29cm
• Weight: 1015g

Rectangular Regular Wide

• Dimensions: 183cm x 64cm x 10cm
• Rolled Size: Diameter: 17cm x Length: 29cm
• Weight: 1015g

Rectangular Large

• Dimensions: 201cm x 64cm x 10cm
• Rolled Size: Diameter: 17cm x Length: 30cm
• Weight: 1115g

Why Choose the Sea to Summit Ether Light XT Extreme?

✔ Highest Insulation Rating in the Ether Light Series – Designed for extreme cold with an R-value of 6.2
✔ Exceptional Comfort & Support – Extra-thick cushioning with Air Sprung Cells™ for a more natural feel
✔ Ultralight Yet Tough – Durable 30D/40D Nylon fabric with field-repairable patches
✔ Fast & Moisture-Free Inflation – Airstream™ Pump Sack and multi-functional valve for quick setup
✔ Anti-Microbial Treatment – Prevents mold growth for long-lasting reliability
✔ PillowLock™ System – Keeps your Aeros™ Pillow securely in place

Sleep Warmer, Go Further

No matter where your winter adventures take you—whether deep into the backcountry, across snow-covered peaks, or into the heart of an alpine expedition—the Sea to Summit Ether Light XT Extreme Sleeping Mat delivers uncompromising warmth, comfort, and performance in a compact, ultralight package.

Because when the temperatures drop, your sleep comfort shouldn’t.

Additional information

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