Winter Mummy Sleeping Bag

• Reliable warmth retention: Mummy shape with anatomical hood — traps body heat and reduces cold bridges at the neck and head.
• Robust construction: 400T ripstop nylon outer, water-repellent and tear-resistant. Because a sleeping bag that rips in the middle of the night simply won't do.
• Ultra-soft lining: 380T polyester lining — skin-friendly and hard-wearing. Comfortable enough to forget you're sleeping outdoors.
• Insulation that works in the wet: Synthetic hollow-fibre fill (polyester microfibre). Retains its loft and warmth even when damp — unlike down, which collapses in moisture. Easy to wash and hypoallergenic.
• 11 fill weights from 400 g to 3000 g: From summer bivvy nights (+20 °C) through to harsh winter camping (approx. −25 °C) — choose the exact insulation your trip demands. Temperatures are manufacturer's guidance, not EN 13537 certified.
• Thoughtful details: Two-way zip for ventilation from top or bottom, anti-slip velcro at the collar, adjustable hood drawcord. You control ventilation without losing a degree.
• Integrated inner pocket: Because searching for your phone at 3am is rather unpleasant.
• Hanging loops at the foot end: For airing out after a night's camping without the hassle.
• Compact and portable: Robust compression sack included — easy to fit in your rucksack.
• Dimensions: 210 × 80 × 50 cm (length × shoulder × foot box). Total weight 1.1 to 3.6 kg depending on fill variant. Manufacturer's tolerance ±5%.

Winter Mummy Sleeping Bag — Why Synthetic Is the Honest Choice

Sleeping outdoors in winter without proper kit risks a night in bitter cold that wrecks your comfort and your morning. A bag that lets moisture through or loses its insulation when damp ruins the trip entirely.

This winter mummy sleeping bag pairs a water-repellent 400T ripstop nylon outer with a synthetic hollow-fibre fill that keeps working through condensation and damp conditions — precisely when down fails. With 11 fill weights from 400 g to 3000 g, you cover every season: a light bag for summer bivvies, or a heavyweight build for nights at −25 °C. Built for bivvy bashers, winter campers and trekkers who want kit that's tough, low-maintenance and honest about what it does.