The Mountain Equipment HELIUM 400 REGULAR is your ideal companion for light trekking tours and bike packing adventures. With only 403 g of high-quality, CODEX-certified duck down and 100% recycled, robust Helium 20D outer material, it impresses with its minimal pack size and amazing thermal performance. The slanted box chamber construction keeps the down perfectly in place, prevents cold spots, and guarantees comfortable warmth even on cooler nights down to 43°F. The anatomically shaped foot section with four chambers and the five-chamber hood offer extra comfort, while the flat Gemini™ zipper and Lode Lock™ system make it easy to use, even at night. The soft, breathable inner material ensures a comfortable sleep from spring to fall. With the HELIUM 400, you'll sleep relaxed and well protected on every tour.