Engineered for Extreme Cold. Built to Be Carried.When temperatures plunge and the stakes are high, the JUNGLE KING Ultralight Duck Down Mummy Sleeping Bag delivers. Rated to -20°C comfort / -35°C extreme, this bag wraps you in premium duck down insulation while keeping pack weight to a minimum. Whether you’re winter mountaineering or cold-weather base camping, this is the bag that won’t let you down.Key Features Duck Down Insulation – Exceptional warmth-to-weight ratio for serious cold Temperature Rating – Comfort -20°C / Extreme -35°C 400T Nylon Outer Shell – Durable, lightweight, and wind-resistant Mummy Cut Design – Contoured fit locks in body heat efficiently Full-Length Zip with Draft Collar – Seals out cold air at every entry point Splicing Design – Zip two bags together for shared use Two Weight Options – 1.8kg (lighter carry) or 2.3kg (extra warmth) Generous Dimensions – 210 × 85 × 60 cm for comfortable movement Specifications Specification Details Fill Material Duck Down Outer Shell 400T Nylon Comfort Temperature -20°C Extreme Temperature -35°C Dimensions (unzipped) 210 × 85 × 60 cm Fill Weight Options 1.8 kg / 2.3 kg Shape Mummy Splicing Yes (double bag compatible) Available Colors Navy Blue, Gray Why Choose This Sleeping Bag?Duck down outperforms synthetic fill at low temperatures — it compresses smaller, weighs less, and insulates better when dry. The JUNGLE KING bag takes that advantage and adds a mummy cut that eliminates dead air space, a draft collar that stops cold from sneaking in at the neck, and a splicing system that lets two bags become one for couples or group warmth. It’s a serious bag for serious conditions.I For Winter mountaineering and alpine camping Cold-weather backpacking Base camp expeditions Polar and sub-zero adventures Couples camping (splicing feature) In the Box 1 × JUNGLE KING Duck Down Mummy Sleeping Bag Compression storage bag