Western Mountaineering SummerLite

The SummerLite is Western Mountaineering's warm-weather mummy bag, rated to 32°F (0°C) and filled with 850+ fill-power goose down in a continuous-baffle construction that lets down migrate for even loft. At 511 g it sits toward the lighter end of the category, though the short-length cut — fitted for users up to 167 cm — and 0°C limit mark it as a summer piece rather than an all-around three-season bag. The 12D nylon ripstop shell keeps weight down without dropping useful details: a fitted, contoured hood, an insulated draft tube along the zipper, and both a stuff sack and storage sack included. The left-side, full-length two-way zipper allows venting on warm nights, and the 227 g fill charge is modest but consistent with the summer rating rather than an inflated number. Hand-built in the USA, Western Mountaineering bags are a known quantity among ultralight and thru-hiking users chasing minimal base weight. The SummerLite fits summer alpine trips and warm-season thru-hiking well; on cold shoulder-season nights the 0°C limit leaves little margin.