Sea to Summit Ether Light XR Insulated ASC Mat - Regular

Enjoy a restful sleep in any conditions with the Sea to Summit Ether Light XR inflatable sleeping mat – with a thickness of 10 cm and high-quality insulation, it offers exceptional comfort and effectively retains your body heat even in low temperatures. The innovative valve and integrated pump in the compression sack make inflating and packing the mat quick and easy.

Designed for three-season use, this Sea to Summit sleeping mat performs excellently at high altitudes and in temperatures as low as -5 to -6°C, with an R-value of 4.1. The R-value is a measure of thermal insulation — it indicates the mat's ability to resist heat transfer. The higher the R-value, the better the mat insulates against the cold. "R" stands for Resistance — the mat's resistance to transferring your body heat to the ground.

Much of the thermal insulation in the Sea to Summit Ether Light XR comes from Sea to Summit’s ThermalCore technology – it uses multiple layers of a material called TRM, which reflects infrared light, effectively redirecting the body heat you emit back toward you. The layered structure limits internal air movement, while additional micro-pores allow for ideal air circulation, maintaining thermal efficiency while reducing both weight and packed volume.

The model also features Air Sprung Cell construction – a unique arrangement of individual air chambers that prevents air from shifting around the mat, so it doesn’t move or sag when you change positions during sleep. With a thickness of 10 cm, the mat offers exceptional comfort and reliable thermal retention, giving you solid support without sinking into it.

The Ether Light XR from Sea to Summit features their XPRESS valve, designed for quick and easy use. The valve includes a one-way inflation port that prevents air from escaping while inflating, and deflation takes just seconds. For added convenience, the compression sack includes an integrated Airstream pump. When flipped inside out, the pump reveals a discreet nozzle specifically designed for inflating pillows with the same valve – such as the brand’s Aeros models.

Lightweight, comfortable, and compact, with high-end thermal insulation technology, the Sea to Summit Ether Light XR Insulated ASC Mat is an excellent choice for trekking, ensuring a restful sleep even in extreme conditions.