Sea to Summit Ether Light XR Insulated Air Sleeping Mat

A lightweight insulated sleeping mat built for plush comfort, efficient packability, and reliable 3-season performance in the backcountry.

The Sea to Summit Ether Light XR Insulated Air Sleeping Mat is designed for users who want a comfortable and technically capable sleeping mat without carrying unnecessary bulk. Aimed at backpacking, thru-hiking, and bikepacking use, it combines low weight and reduced packed size with a sleeping surface intended to provide noticeably more cushioning than lower-profile air mats.

At the core of the mat is Sea to Summit’s Air Sprung Cell construction, which creates a more stable and supportive feel across different sleeping positions. With a thickness of 10 cm, the mat is designed to deliver plush comfort whether sleeping on the back, side, or stomach, helping reduce pressure points during long nights outdoors.

ThermalCore insulation uses multiple TRM layers to reflect infrared energy back toward the sleeper while helping keep overall weight and packed size low. This gives the Ether Light XR an ASTM-tested R-value of 4.1, making it suitable for extended 3-season use where warmth and comfort both matter.

The mat also focuses on practical field usability. Sea to Summit’s XPRESS valve and the Airstream pump integrated into the stuff sack are designed to make inflation, adjustment, and deflation quicker and easier, while increased weld strength improves durability for regular outdoor use. PillowLock patches are included to help secure a compatible Aeros pillow in place for a more stable sleep setup.

With its combination of comfort-focused thickness, efficient insulation, and compact transportability, the Ether Light XR Insulated Air Sleeping Mat is a practical option for users who want a lightweight sleep system without sacrificing warmth or overnight comfort.

Features

• Designed for backpacking, thru-hiking, and bikepacking

• 10 cm thick construction for plush comfort

• Air Sprung Cell construction for stable support in different sleeping positions

• ThermalCore insulation with multiple TRM layers

• ASTM-tested R-value of 4.1 for extended 3-season use

• Lighter weight and reduced packed size compared to previous models

• XPRESS valve for fast inflation, adjustment, and deflation

• Airstream pump integrated into the stuff sack

• Increased weld strength for improved durability

• PillowLock patches for securing a compatible Aeros pillow

Technical Specifications

• Best use: Backpacking, thru-hiking, bikepacking

• Weight: 605 g

• Packed size: 24 × 11.5 × 11.5 cm

• R-value: 4.1 ASTM tested

• Thickness: 10 cm