Sea to Summit Ether Light XT Extra-Thick Air Mattress – Large 78 x 25 x 4 in

Meet the Sea to Summit Ether Light XT Extra-Thick Backpacking Air Mattress in Large. Built for warm-season adventures, this 4-inch-thick pad blends a cushioned surface with lightweight design to support comfort after a long day on trail, gravel roads, or bike routes. At roughly 1.1 pounds and packing down to a compact 4 x 8.75 inches, it aims to simplify setup and packing while keeping your energy for the next day’s miles.

Soft, supportive comfort on the go

The mattress uses a purposefully designed Air Sprung Cell system that mirrors a spring mattress, increasing contact with your body and distributing pressure more evenly. The result is a plush feel across a larger surface area, which can be especially beneficial for side sleepers seeking steady support throughout the night.

Inflation, deflation, and on-trail adjustments

Inflation is quick and easy thanks to a multi-function valve paired with the integrated Airstream Pumpsack, letting you reach a comfortable level in just a few breaths. A one-way deflation feature speeds up packing, while fine-tuning valves let you adjust air pressure to suit your preference on any given night.

Durable, quiet, and sleep-friendly fabric

The mat uses a single-layer construction with flexible loops that create large air pockets, delivering a plush, stable surface that remains quiet and non-slip on uneven ground. The 30D/40D nylon face fabric is designed to withstand field use while keeping noise and movement to a minimum.

Size, packability, and what's in the box

• Large dimensions: 78 x 25 x 4 inches for ample sleeping space
• Compact pack size: 4 x 8.75 inches
• Weight: about 1.1 pounds
• Includes stuff sack, field repair kit, and PillowLock patches to secure a Sea to Summit pillow to the mat

Reasons to consider this mat for your trips

• Comfort-focused design with air cells that adapt to your body
• Fast setup and easy pack away with the Pumpsack and valve system
• Quiet fabric reduces noise and movement for uninterrupted rest
• Compact enough for backpacking, yet roomy enough for comfortable side-sleeping

While this mat offers a compelling blend of comfort, weight, and convenience, individual results can vary with terrain and sleeping style. Consider your typical adventure length, expected temperatures, and preferred sleeping position when evaluating whether this model fits your backcountry routine.