Marmot Women's Trestles 30° Sleeping Bag

The Marmot Women's Trestles 30° is a three-season synthetic mummy bag insulated with SpiraFil, rated to a manufacturer-tested +2°C comfort / -3°C limit rather than the EN ISO 23537 standard used on some other bags in the range — worth knowing when cross-shopping ratings. At 1580 g with a 70D polyester shell and embossed polyester liner, it's built for weather resistance rather than minimal weight. Comfort-oriented details stand out: a 3D anatomical hood for a warmer fit around the head, footbox ventilation for warmer nights, and an internal pocket for small essentials. The left-side, full-length two-way zipper allows venting or pairing with a compatible bag, and a stuff sack is included. A warmth-to-weight ratio of 1.9 and roughly 527 g per degree are noticeably higher than colder-rated bags in the lineup, which is expected — warmer bags carry proportionally more shell and zipper weight relative to insulation. This is a mild-weather bag: summer camping and warm three-season trips where synthetic fill's wet-weather reliability matters more than shaving grams, sized up to 167 cm.