Sea to Summit Ether Light XT Large Insulated Sleeping Pad – 78 x 25 x 4 in

All-season comfort with targeted insulation

Meet Sea to Summit's Ether Light XT Large, an insulated sleeping pad designed for winter camping and backpacking. Its extra-thick profile and thoughtful design deliver a plush sleeping surface while focusing on warmth and stability in cold environments.

The pad offers a robust 4-inch thickness and a 6.2 R-value, which suggests a strong barrier against cold ground. The Air Sprung Cell construction mimics the feel of a traditional mattress, using a single-layer system with insulated flexible loops that help distribute weight and trap warmth for a more even sleep surface.

Smart inflation and packing

• Multi-function valve supports fast inflation in just a few breaths, one-way deflation, and easy air pressure fine-tuning.
• Integrated Airstream Pumpsack simplifies inflating on the trail and reduces air loss during setup.
• Pack size shrinks to a compact 7.3 x 11 inches and weighs about 2.1 pounds, aiding travel efficiency.

Warmth, comfort, and durability

• Insulated pad features high-loft fiberfill and reflective fabric to minimize heat loss and radiate warmth back toward the sleeper.
• Durable, quiet surface built with a non-slip 30D/40D nylon face fabric for stability and a low-profile feel when moving on the pad.
• PillowLock patches enable securing a compatible Sea to Summit pillow to the mat, enhancing neck and head support.

Size, weight, and included accessories

The Large edition measures 78 x 25 x 4 inches, packs to 7.3 x 11 inches, and weighs 2.1 pounds. Each package includes a stuff sack, a field repair kit, and PillowLock patches for pillow compatibility on compatible Sea to Summit pillows.

Real-life use cases

Imagine nights under a frosty sky where ground chill is offset by plush warmth and a supportive sleep surface. The Ether Light XT can be a reliable companion for high-altitude treks, winter camping weekends, or any journey where you want dependable insulation without adding bulk. The combination of warmth, comfort, and stability can help you enjoy the night and wake refreshed, ready for the day ahead.