Sea to Summit Ether Light XT Extreme Mat Women's Large black/persian red

A cold-weather sleeping mat built around women's-specific geometry and dual-layer Thermolite insulation for serious winter camping.

The Sea to Summit Ether Light XT Extreme Mat is an inflatable sleeping mat engineered for cold conditions. The women's-specific cut — wider at the hip, narrower at the shoulder — matches female body geometry, while Air Sprung Cell construction delivers 10 cm of stable, even support across the full mat surface. Dual-density Thermolite insulation and an R-value of 6.3 make it a capable choice for demanding winter environments.

Features

• ASTM R-value of 6.3 — rated for cold-weather use

• Dual-density Thermolite insulation layers for thermal performance

• Women's-specific cut: wider at the hip, narrower at the shoulder

• 10 cm Air Sprung Cell construction for stable, consistent support

• 30/40D Nylon face fabric — quiet, grippy, and packable

• Ultra-Fresh anti-microbial TPU treatment prevents internal mould growth

• Pillow Lock system compatible with Aeros pillows

• Multi-function high-flow valve with included Airstream Pump Sack for fast inflation and deflation

• Field-repairable with included self-adhesive patches

Technical Specifications

• Material: 30/40D Nylon

• Insulation: Thermolite

• R-value: 6.3

• Thickness: 10 cm

• Dimensions: 183 × 64 cm

• Packed size: 18.5 × 28 cm

• Weight: 870 g