Mountain Equipment Kryos Sleeping Bag (-20°C/-4°F)

Part of the brand’s Extreme Alpine sleeping bag collection, the lightweight Kryos has been meticulously crafted for alpine expeditions and cold-weather adventures where minimal weight and maximum protection are of the utmost importance.

By blending premium-quality 800-fill power minimum goose down with a highly breathable, water-resistant DRILITE® LOFT 10-denier outer fabric, the Kryos is perfectly suited to remote and frigid settings, handling snowmelt and condensation with ease. For enhanced defence against moisture, the DRILITE® fabric also lines the hood, collar, and foot box—specific areas most susceptible to damp conditions.

Trapezoid baffles offer an ideal balance between warmth, packability, and weight distribution throughout the sleeping bag. A sophisticated seven-baffle construction directs insulation to the hood and collar for consistent warmth and protection during extended use. Meanwhile, in the ergonomically designed foot box, a six-baffle arrangement ensures heat is concentrated around the feet. A full-length Gemini™ zip baffle minimises heat loss along the zip, while the low-profile magnetic Lode Lock™ fastening and easily accessible collar drawcords remain practical in the dark or under harsh alpine conditions.

The brand’s extreme alpine bags are shaped with a tapered Alpine fit, which allows room for extra insulation layers or boots and enables sleeping in a seated or curled-up position when space is limited on bivy ledges.

With a Good Night’s Sleep Temperature rating of -20°C, the Kryos stands as the warmest option within the extreme alpine series. This figure reflects rigorous laboratory analysis, extensive field testing, and feedback from real expeditions—representing the lowest temperature at which an experienced user is expected to sleep comfortably in real-world conditions.

Features

• The DRILITE® LOFT 10D outer shell is extremely lightweight, breathable, and resistant to moisture.
• It contains 743g of 90-10 European goose down with a minimum fill power of 800 for superior insulation.
• The Alpine Fit 2.0, enhanced by the refined EXL® system, increases both comfort and loft, while improving thermal performance.
• Trapezoid-shaped baffles are used throughout the design to optimise warmth and reduce weight.
• Ground-level side seams contribute to improved insulation and structural integrity.
• The anatomically contoured hood features a low-volume, seven-baffle layout for enhanced head warmth.
• The ergonomically sculpted foot box includes a six-baffle construction that is offset for effective thermal coverage.
• A full-length Gemini zip baffle with a 140cm zipper and integrated neck collar includes a Lode Lock closure system to limit heat escape.
• The DRILITE® LOFT 10D fabric also lines the hood, collar, and foot-box interiors for added moisture protection.
• The sleeping bag is supplied with a waterproof roll-top stuff sack and a separate storage cube for convenience and longevity.
  
  

Specifications

Technology

	Down 800 Their very best Eastern European goose down. Sourced from Western Russia, with a minimum down cluster content of 90% and individually tested to ensure a minimum fill power of 800 cubic inches. DOWN CODEX approved.
	Drilite Loft Drilite® Loft is our exclusive range of highly water repellent fabrics used in their insulated clothing and equipment. The original Drilite® Loft, introduced almost 30 years ago, was years ahead of its time: a highly breathable, lightweight, and very water repellent fabric. Those three hallmarks continue with their modern Drilite® Loft fabrics.
	Down Codex® The DOWN CODEX® is our multi-award-winning certification scheme that considers the environmental, ethical and animal welfare matters relating to our down supply chains. It is grounded in comprehensive and transparent auditing that ensures traceability and quality.
	Fair Wear As a member of Fair Wear, Mountain Equipment is committed to implementing the highest standards of working conditions. Mountain Equipment were awarded 'Leader Status' by Fair Wear Foundation in 2016 and has been awarded their highest accolade for performance every year since.

Detail Shots

	Trapezoid baffles throughout.
	7 baffle low volume anatomically shaped hood.
	6 baffle anatomically shaped and offset foot-box.
	Full length Gemini zip baffle with 140cm zip and integrated neck collar with Lode Lock closure.
	Integrated neck collar with Lode Lock closure.
	DRILITE® LOFT 10D outer shell is ultra-light, highly breathable and water-resistant.

More Information

Extreme Alpine Sleeping Bags

True expedition bags in all but weight, redefining what is possible for those in need of high levels of protection and reliable warmth. Developed specifically for climbers and mountaineers tackling the world’s last great problems and pushing the envelope of possibility to its limit, these lightweight, protective bags are anything but simple. Providing absolute confidence for self-supported trips in remote locations, these are designed for alpinism’s leading edge.

Shop The Extreme Alpine Range

Video