The North Face Inferno -40°F Sleeping Bag – Expedition-Grade Down Mummy Bag

Conquer extreme cold with confidence. The The North Face Inferno -40°F Sleeping Bag is built for high-altitude expeditions and arctic conditions where warmth and reliability are non-negotiable.

This expedition-grade bag features 900-fill ProDown™ insulation, offering superior warmth-to-weight performance and water resistance. The Neovent Air™ fabric provides breathable protection against frost and moisture, while the sculpted hood and draft collar seal in heat even in subzero temperatures.

Designed for mountaineers, explorers, and cold-weather adventurers, the Inferno -40°F delivers elite-level thermal efficiency in the harshest environments.

Features:

Temperature Rating: -40°F / -40°C

Insulation: 900-fill water-resistant ProDown™

Shape: Mummy design for maximum thermal retention

Shell Material: Neovent Air™ outer with recycled nylon liner

Construction: Trapezoidal side baffles prevent cold spots

Zipper: Full-length, anti-snag YKK zipper

Use: High-altitude mountaineering, polar expeditions, extreme winter camping

Product Details

Weight: ~3 lbs 13 oz (1.73 kg)

Length Options: Regular (fits up to 6’) / Long (fits up to 6’6”)

Packed Size: 9” x 18”

Color: Flame / Asphalt Grey

Season: 4-season extreme cold