Western Mountaineering MityLite

The Western Mountaineering MityLite is a semi-rectangular summer sleeping bag rated to 4°C, built for warm-weather comfort rather than outright minimal weight. It weighs 740 g in regular size with 340 g of 850 fill-power goose down inside a 12D nylon ripstop shell, using sewn-through baffles — simpler and lighter per baffle than box construction, though it creates thin, uninsulated seams at each stitch line. Full-length two-way zippers run down both sides and the bag is coupleable, so two MityLites can be zipped together into a double-wide quilt — a real trade-off, since there's no draft collar or draft tube to seal the extra zippers, and the added hardware and sewn-through construction push its weight-per-degree figure notably higher than Western Mountaineering's mummy bags in this range. It suits car camping, warm summer trekking, or couples wanting a shared sleep system more than solo ultralight thru-hiking, where a mummy-shaped bag would deliver more warmth per gram. Regular sizing accommodates users up to 190 cm.