Marmot Men's Wind River -10° Sleeping Bag

The Marmot Wind River -10° is a manufacturer-rated winter mummy bag with a -23°C limit (not EN/ISO-tested), clearly four-season gear for cold winter trekking, not general three-season use. Fill is 1200 g of 650 fill-power duck down, hydrophobic-treated and RDS-certified. At 1860 g total, with a fill efficiency of about 1.92 g of down per gram of warmth, it sits mid-weight for winter bags. Lower 650 fill power versus Marmot's premium 800+ lines means more down, and more weight, for comparable warmth. The shell pairs 20D nylon mini ripstop on top with tougher 30D DWR-treated nylon underneath, backed by a 20D nylon taffeta liner; recycled material and PFC-free treatment add a sustainability plus. Half-length, dual-side zippers allow venting top or bottom, and a ventable footbox adds heat control. A fitted hood, draft collar and draft tube cut heat loss at the seams, and an internal pocket plus stuff and storage sacks round out the kit. Internal length runs to 200 cm, more room than narrower bags, packing to 48 x 24 cm. The cut is men-specific, Regular size up to 182 cm.