Mountain Equipment Helium 800 Women's Sleeping Bag (-13°C/9°F)

Ideally suited for backpacking and trekking in cold climates. Whether spending nights in unheated tea-houses in the Himalayas or winter shelters in the Alps, this warm yet lightweight sleeping bag is a dependable companion.

Crafted with 795g of ethically sourced, minimum 700-fill power DOWN CODEX-approved duck down and wrapped in a high-performance, 100% recycled Helium 20D outer shell, the Helium 800 offers impressive warmth, low weight, and remarkable compressibility for effortless packing. With a blend of versatility, durability, and expedition-proven design, this sleeping bag thrives whether used for high-altitude trekking or winter ski touring.

Its slant-baffle construction throughout the body enhances insulation, improves packability, and keeps down securely in place—eliminating cold spots and delivering warmth, night after night. At the base, a four-baffle system is specifically engineered to concentrate heat around the feet—vital for enduring long periods in frigid conditions. Meanwhile, the hood features a five-baffle layout for maximised comfort and to maintain optimal down distribution.

Inside, a 100% recycled Supersoft 20D lining fabric with a PFAS-free DWR coating provides breathability and resilience, ensuring cosy nights and lasting performance. A full-length Gemini™ zip baffle all but eliminates heat loss along the entry point and is reinforced to avoid snagging. The low-profile magnetic Lode Lock™ fastening and collar drawcords offer ease of use, even in the dark.

Designed with a technically refined yet comfortable Alpine 2.0 fit, Helium sleeping bags are built to maximise thermal efficiency while keeping weight to a minimum. With a Good Night’s Sleep Temperature rated at -16°C (3°F), the Helium 800 delivers reliable warmth and portability, making it the ideal choice for cold-weather camping, trekking, and touring.

Features

Insulation

• The insulation is tailored baffle by baffle for the best possible warmth-to-weight efficiency.
• The Regular version is filled with 734g of 90/10 duck down, boasting a 700+ fill power rating.
• The Long version contains 772g of 90/10 duck down, also with 700+ fill power.
• All down is ethically sourced through the DOWN CODEX© and RDS 3.0 programmes.
• Each sleeping bag comes with a unique DOWN CODEX© code, allowing full traceability of sourcing and fill quality.

Materials

• Recycled HELIUM™ 20D: A lightweight (38gsm), recycled 20-denier fabric that offers a balanced blend of durability, packability, and resistance to the elements. The tight weave defends against wind and heat loss, and it features a PFAS-free DWR coating.
• Supersoft™ Lining: A 38gsm, 20D recycled downproof nylon that offers breathability, toughness, and soft next-to-skin comfort, treated with a PFAS-free DWR finish.

Patterning & Design

• Designed for lasting durability and technical performance.
• Women’s Alpine Fit: A tapered, tailored shape with a zoned EXL® system to enhance thermal efficiency while cutting down on weight.
• Slanted box-wall baffles: These reduce structural bulk while delivering optimal insulation.
• Strategic fill placement: Heavier insulation is concentrated in crucial zones (such as the underside, hood, and foot box) to stop down migration and retain warmth.

Foot Box

• Trapezium 4 System: A four-baffle configuration around the feet increases warmth and reduces compression, keeping feet better insulated.

Hood

• Features a five-baffle structure that ensures precise down positioning, minimal weight, and excellent heat retention.
• Designed to be roomy yet close-fitting, with twin tether drawcords to minimise heat escape.

Zip Baffles & Collars

• Gemini™ Baffle System: A sleek, lightweight design that keeps warmth in and chills out at the zip area.
• Lode Lock™ System: A secure magnetic closure with a mechanical lock that can be quickly released with one hand.
• The integrated and adjustable neck collar is down-filled for added insulation around the upper body.

Additional Features

• Waterproof roll-top stuff sack: Maximises packing efficiency and ensures contents remain dry.
• Storage Cube: Preserves the down’s loft for long-term storage and maintains performance when not in use.
  
  

Specifications

Technology

	Down 700 Down is the finest insulator that we have. Its warmth to weight ratio, compressibility, long lifespan, and softness are yet to be matched by manmade insulations. For all but the most serious expeditions, duck down is a great choice for both insulated clothing and equipment.
	Helium Helium fabrics are exceptionally light, compressible and soft. Their densely woven construction ensures the highest levels of down-proofing and wind resistance.
	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.

Detailed Shots

	Using slanted box-wall baffles throughout the entire main body of the helium bags means weight is removed from the bags structure, yet they remain a significant step above a standard box baffle.
	5 baffle anatomically shaped hood.
	4 baffle anatomically shaped and offset foot-box.
	Full length Gemini zip baffle with 140cm zip and integrated neck collar with Lode Lock closure.
	100% recycled HELIUM 20D outer shell is very light and highly breathable with PFC free DWR.
	Integrated neck collar with Lode Lock closure.

More Information

Helium Sleeping Bags

Efficiently sized, supremely comfortable and low in weight each Helium bag offers outstanding all-round performance for backpackers, cycle-tourers and trekkers. These bags don’t skimp on features and will keep you warm and comfortable whether on a summer road-trip or extended trek.

Shop The Helium Range