Slightly more tapered in the upper body and in the legs than our Mountain Fit, our Alpine Fit maximises thermal performance while minimising weight.

A more generous fit that’s both longer and wider, these bags afford greater comfort when used for longer periods of time but also enable additional clothing to be worn or stored inside the bag more easily.

Drilite® Loft 30D (also known as Drilite® Loft II) is our time-tested and most durable iteration of Drilite® Loft, borne from years of development work and countless hours of user testing. It is the ideal fabric for clothing and sleeping bags destined for serious mountaineering, climbing, and backpacking in difficult conditions. Weighing 55g/m2 and with its 1500mm hydrostatic head it is ideal for protecting high quality down and synthetic insulations.

The inside of the Glacier bags are all lined with 100% recycled Supersoft 20D lining fabric with a fluorocarbon free DWR, chosen for its breathability and durability.

14:7 trapezoid baffles are a premium construction method for exceptional sleeping bags. They offer excellent overlap of baffles, reducing thermal bridges and the associated conductive heat loss. This means less down is required to keep you warm, especially under prolonged use. In trapezoid 14:7 baffles, side-walls form the ‘magic angle’ that maximises strength and stability to offer excellent down control and loft. Trapezoid baffles are lighter in weight than V baffles and offer excellent down control.

Our Lode Lock™ collar closure with its low profile auto-locating closure combines all the advantages of a magnetic fastener with those of a mechanical lock. Rendering the traditional press-stud collar closure practically obsolete, its one handed quick release closure uses two captivated internal magnets to draw the locking mechanism together and ensure that once connected it cannot be accidentally opened. The result is an insulated collar that is more efficient and easier to operate. The collar’s down density is optimised so it moves with the user and contours to the body, while captive and elasticated drawcords ensure easy adjustment.

Our Gemini™ baffle is found throughout almost our entire line of sleeping bags. It is a unique zip baffle system which replaces the bulky, down hungry twin draft tubes used traditionally on cold weather bags. The Gemini™ system is light, efficient, low bulk and supremely protective. It is grown on to the sidewalls of the sleeping bag: the integrated zip baffle utilises a continuous V-baffle system paired with a shaped and stiffened underside. With a greater contact area than a traditional tubular set-up, heat loss by convection is significantly reduced and radiative heat loss minimised. Tested through every step of its development, it eliminates heat loss almost entirely and at a fraction of the weight and bulk of more traditional methods.

A 5 baffle hood that provides high levels of down control, low weight and excellent insulation. Its roominess imparts excellent versatility and, combined with the easy-run dual tether draw cords, superb comfort.

A six baffle foot piece, our most advanced design, and featuring both our Bulls Eye™ Technology and offset Sharks Toe™ foot constructions. Its highly sophisticated baffle system maximises thermal efficiency for the coldest and most demanding environments, ensuring warm feet night after night.