Materials:
* Body Fabric: GORE-TEX® Windstopper 30D 2-Layer Nylon Ripstop 57 g/m²
* Lining Fabric: 15D Nylon Ripstop 34 g/m²
* Shell Fabric: GORE-TEX® Windstopper 30D 2-Layer Nylon Ripstop 57 g/m²
* Insulation: 800-fill RDS®-Certified Down/Fluorine Free

Specs:
* Approx. Weight: 4 lb 8.4 oz / 2052 g
* Bag Shape: Expedition Mummy
* Temperature Rating: -40 F / -40 C
* Approx. Bag Fill Weight: 2 lb 15.5 oz / 1348 g
* Compressed Size: 20 in x 11 in / 51 cm x 28 cm
* Sleeping Bag Compressed Volume: 939 in³ / 15.4 ltr
* Max User Height: 72 in / 183 cm
* Shoulder Circumference: 66 in / 168 cm
* Hip Circumference: 62 in / 157 cm

Features:
* 800-fill down insulation for optimal warmth-to-weight ratio and compressibility
* Gore-Tex WINDSTOPPER® fabric is breathable highly water-resistant windproof and ideal for severe conditions
* Expedition mummy cut efficiently adds space to allow for gear storage in freezing temps
* Lightweight but durable #5 zipper with anti-snag for easy entry and exit
* Shaped draft collar blocks the escape of warm air from inside the bag
* Oversized down-filled face gasket extends into the hood to comfortably block drafts
* Oversized hood allows for full cinch closure in freezing temps
* Contoured footbox follows natural foot position for maximum warmth and comfort
* Vertical side wall baffles for added warmth and maximum loft
* Glow in the dark reflective zipper pull
* Nylon compression sack and mesh storage sack included
* Oversized dual zipper draft tubes prevent cold spots along the zipper