Mountain Equipment Extreme Light Sleeping Bags offer industry-leading warmth with astonishingly low weight and pack size. Designed for those who refuse to compromise, whether you’re pushing for high-altitude summits, embarking on ultralight treks, or shaving every gram from your ski touring kit, these bags deliver unmatched performance.

The range includes the Xenith I, II, and III, which have been completely reimagined while building on the legacy of their predecessors. They have quickly become the preferred choice of sleeping bag among our athlete team tackling the Himalayas, Karakoram, and Alaska. With expert craftsmanship refined over decades, these sleeping bags combine cutting-edge materials with intelligent design to offer comfort, efficiency, and durability in the harshest environments.

Each bag is filled with 900-fill-power European goose down, held in place by vertical box wall chest baffles and slant main body baffles, ensuring optimal warmth distribution. The PLASMA 10D fabric is ultralight, breathable, and treated with a PFAS-free DWR for reliable performance. Unlike many lightweight alternatives, these bags don't sacrifice usability and comfort to shave off a few extra grams.

From high mountain bivis to multi-day alpine missions, the Extreme Light Sleeping Bags are ready for any adventure when every gram counts.