The Mountain Equipment HELIUM 800 LONG is your perfect companion for frosty outdoor adventures where you want to rely on maximum warmth and comfort. With 795 g of certified duck down (DOWN CODEX) and a fill power of at least 700 cuin, it offers exceptional insulation with minimal weight. Its fully recycled Helium 20D outer fabric ensures durability and an extremely compact pack size. The slanted box baffle construction prevents down shifting and cold spots, keeping you warm throughout. The anatomically shaped foot section with four chambers provides extra warmth for your feet – ideal for long nights in cold regions. The five-chamber hood distributes the down optimally and fits comfortably around your head. The breathable, 100% recycled inner material with PFC-free DWR is comfortable against the skin and durable. The 140 cm long zipper with Gemini™ system protects against heat loss and is reinforced to prevent snagging. With a magnetic Lode Lock™ closure and easy-to-use drawstrings on the thermal collar, you can easily regulate the temperature, even at night. The slim Alpine 2.0 Fit provides maximum warmth with minimum weight. With a "Good Night's Sleep" temperature of -16°C, the Helium 800 LONG keeps you reliably warm, whether you're winter backpacking, ski touring, or on demanding expeditions at higher altitudes. So you can look forward to your next outdoor trip and sleep soundly.