Bristlecone MF

Bristlecone MF – Expedition Sleeping Bag for Extreme Cold The Bristlecone MF is an expedition sleeping bag for extreme cold, designed for deep-winter comfort in the harshest environments. This bag is built for Arctic expeditions, high-altitude base camps, and late-season hunts where staying warm is mission-critical. Its wide, semi-rectangular shape provides extra space to layer up, shift positions, or simply stretch out. You won’t sacrifice insulation for comfort. With 850+ fill power goose down and massive loft, the Bristlecone offers serious heat retention in sub-zero conditions. The MicroLite XP™ shell resists water and wind while remaining breathable. It sheds frost and spindrift while protecting the insulation inside. A full down-filled collar and insulated draft tube seal in warmth and block out the cold. This bag thrives in bitter cold. Whether you’re camped in a snow cave or on a wind-swept ridgeline, the Bristlecone MF offers trusted warmth and durability. Its roomy cut makes it perfect for long base camp stays or anytime you want to sleep in full layers. At 4 lbs 3 oz, it’s surprisingly light for a bag with this much insulation and space. It packs efficiently for its size, making it ideal for cold, gear-heavy expeditions. Handmade in the USA, the Bristlecone MF combines expedition-ready performance with unmatched sleeping comfort. When the temperature drops and the weather turns unforgiving, this is the bag you’ll want to be in.