Description
The Ultra sleeping bag line uses first-class materials and high-quality down for uncompromising performance with minimum weight and packing volume.
The Ultra -10C is a lightweight, high-performance 4-season sleeping bag, designed for those who want minimum weight, a small pack size, and maximum warmth, even in demanding conditions - the ideal companion for ambitious trekking adventures, alpine tours, and bivouacs.
The high-quality, durable RDS-certified musk duck down ensures efficient insulation and an outstanding warmth-to-weight ratio. The adjustable, elliptical thermal collar minimises heat loss. The specially designed 3D foot box provides additional insulation in the foot area, while the side cover strip along the zip reliably prevents cold bridges.
The outer and inner materials are made from 100% recycled nylon, making the sleeping bag hard-wearing. The Ultra -10C is available in many different sizes for an optimum fit.
- outstanding warmth-to-weight ratio
- high-quality musk duck down & recycled nylon
- adjustable thermal collar
- Insulated with warm & eco-friendly duck down certified to the highest animal welfare standards.
- Roomy footbox allows natural leg movement in a compact sleeping bag.
- Easy-access internal pocket for phones, headlamps, and essential items.
- Adjustable drawstring hood & draft collar reduce heat loss and keep you warm at night.
- Anti-snag zipper for smooth zipper operation and large zipper garage to keep zipper away from face.
- Included waterproof drybag protect sleeping bag from dirt and moisture when out on the trail.
- Comfort Temperature: -2 °C
- Limit Temperature: -8 °C
- Extreme Temperature: -26 °C
- Weight: L: 1170 g
- Fill Weight:L: 730 g
- Length: L: 218 cm
- Shoulder Width: L: 151 cm
- Foot Width: L: 99 cm
- Shell Fabric:recycled 10 D ripstop nylon, bluesign® approved fabric PFAS free
- Liner: recycled 15 D ripstop nylon
Oeko-Tex® 100 certified, DWR free, PFAS free
- Fill: 850+ cuin/oz Muscovy Duck Down, RDS certified, Oeko-Tex® 100 certified
Contact us within 30 days of receiving your goods to request a refund or exchange if products are eligible (see: Return Policy).
All packaging or products must be in their original, re-sellable condition.
Outlet sales are final and can only be returned for exchange. Items found faulty or under warranty will be replaced or refunded.
Some special condition products are labelled as Clearance OR No Refund & Exchange Products. Sale of these items are final and are not eligible for neither refunds nor exchanges.
For safety reasons, K2 cannot accept returns on climbing equipment, socks, underwear and some other products unless faulty.
Please check out our refund policy if you need more information.











