Built for comfort-forward backcountry sleep, the Sea to Summit Ether Light XR Insulated ASC Sleeping Mat - Grey (Large) pairs generous length with serious 3-season warmth. Its 10 cm Air Sprung Cell design smooths out uneven ground and supports side sleepers, while ThermalCore insulation boosts warmth with minimal added weight or pack size. The included stuff sack doubles as an Airstream pump for quick inflation, and the high-airflow XPRESS valve makes it easy to dial in firmness or dump air fast when packing up. With durable materials and stronger welds, it’s a dependable mat for longer bodies and longer trips.

Sea to Summit Ether Light XR Insulated Mat (Large) – Key Features

• ThermalCore insulation: Suspended TRM layer reflects warmth back to the sleeper effectively.
• Extended 3-season warmth: ASTM-tested R-Value of 4.1 for cool to cold nights.
• 10 cm thick comfort: Air Sprung Cells provide plush, stable support.
• Quick inflation system: Pumpsack integrated into the stuff sack speeds up setup.
• XPRESS valve control: Easy inflation, pressure adjustment, and rapid deflation.
• PillowLock compatible: Included patches help secure your Aeros Pillow for a slip-free sleep.

Specifications – Ether Light XR Insulated ASC Sleeping Mat (Large)

• Best Use: Backpacking, Thru-hiking, Bikepacking (Tapered)
• Comes With: Stuff sack with integrated pumpsack, PillowLock patches, repair kit
• Material(s): 30/40D nylon with TPU lamination, single-layer TRM reflective insulation
• R-Value (ASTM): 4.1
• Thickness: 10 cm (3.9 in)
• Weight: 605 g
• Stuff / Pump Sack Weight: 60 g
• Packed Weight: 665 g
• Packed Size: 24 x 11.5 x 11.5 cm
• Fits Up To Height: 198 cm