Mountain Equipment Redline Sleeping Bag (-45°C/-49°F)

This is the warmest sleeping bag in the collection, meticulously crafted for the harshest and most unforgiving conditions found during Antarctic expeditions and climbs on 8,000-metre peaks.

As part of the Extreme Expedition sleeping bag series, the Redline has been engineered for sustained use in polar regions and at the highest altitudes.

It features 1,282 grams of ultra-high quality, minimum 800-fill power European goose down, all ethically sourced and CODEX-approved. This is combined with a lightweight yet durable 10-denier GORE-TEX WINDSTOPPER® outer shell, offering superb warmth in punishingly cold temperatures while maintaining excellent breathability and water resistance.

Like all models in the Extreme Expedition range, the Redline incorporates the brand’s most intricate baffle design. Across the chest and upper legs, V-shaped baffles are used to enhance down overlap and eliminate cold spots. In the centre of the bag, trapezoid baffles prevent the down from migrating, preserving uniform insulation. Full-length baffles along both sides help maintain the bag’s efficient box-wall construction. The hood employs a complex seven-baffle system to ensure concentrated warmth around the head, essential for long-term cold exposure. Meanwhile, the anatomically contoured foot box features six baffles to direct warmth to the feet, where it is often needed most.

The distribution and density of down are carefully tailored throughout the sleeping bag. Denser down is positioned underneath to counteract compression, while the upper sections are designed to maximise loft and thermal efficiency. Inside, the tried-and-tested EXL® elasticated stitching system works to minimise dead air space, reduce draughts, and lift the inner fabric away from the down, encouraging full loft and superior warmth.

A full-length Gemini™ zip baffle greatly reduces heat loss along the main opening—traditionally one of the most vulnerable areas. The magnetic Lode Lock™ closure sits low-profile for comfort and ease, and its intuitive design, along with the collar drawcords, allows for smooth operation in the dark. For added practicality, the Redline also features an internal mesh pouch and a secure zipped pocket to keep essential items close at hand.

The Extreme Expedition fit provides generous space for comfortable sleeping, and easily accommodates extra down layers when required. A large, breathable GORE-TEX WINDSTOPPER®-lined foot box allows room for storing boot liners or damp clothing, without compromising insulation.

With a Good Night’s Sleep Temperature of -45°C (-49°F), the Redline is an exceptionally warm, dependable, and hardwearing sleeping bag, purpose-built for those venturing into the coldest corners of the world.

Features

• GORE® THERMIUM™ 10D outer shell is durably light, highly breathable and rain-resistant. 
  
• 1282g of 90-10 Goose Down with a minimum full power of 800
• Expedition fit with EXL® system is both roomier and has improved loft and thermal efficiency
• V chest baffles & Trapezoid main body baffles
• Ground level seams with V-side baffle
• 7 baffle anatomically shaped and offset foot-box
• Full length Gemini™ zip baffle and integrated neck collar with Lode Lock™ closure
• GORE® THERMIUM™ 10D inner foot-box and hood lining
• Inner pocket for keeping essentials warm and dry
• Supplied with a waterproof roll-top stuff sack and storage cube

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.
	GORE-TEX INFINIUM™ GORE-TEX INFINIUM™ fabrics combine multilayer membrane technology with high performance fabrics to produce materials that are windproof, highly breathable and extremely resistant to rain and snow. Weather resistance, protection and comfort are the INFINIUM™ hallmarks.
	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

	Vertically aligned V-baffles on the chest and foot piece, 14:7cm Trapezoid baffles throughout all other parts of the bag results in minimal down migration and maximum possible warmth in all situations.
	Our Lode Lock collar closure with its auto-locating closure combines all the advantages of a magnetic fastener with those of a mechanical lock. Its one-handed quick release closure uses magnets to draw the locking mechanism together and ensure that once connected it cannot be accidentally opened.
	7 baffles provide exceptional down control for performance and excellent insulation. The DC7 LV hood reduces weight, has less deformation when cinched down small, and offers single handed closure and easy-run dual tether draw cords for greater ease of use in extreme conditions.
	GORE-TEX INFINUM™ 10D outer shell is durably light, highly breathable and rain-resistant.
	A six-baffle foot piece, Mountain Equipment's most advanced design, and featuring both their Bulls Eye Technology and offset Sharks Toe foot construction. Its highly sophisticated baffle system maximises thermal efficiency for the coldest and most demanding environments, ensuring warm feet night after night.
	Inner pocket for keeping essentials warm and dry.

More Information

Extreme Expedition Sleeping Bags

Engineered to withstand extreme cold in the most hostile environments on earth. With durably rain-resistant fabrics and construction optimised to maximise and maintain warmth for extended periods these bags are built specifically for the needs of explorers and mountaineers undertaking the most committing journeys in the highest, coldest and most remote locations.

Shop the Expedition Range

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