Marmot Trestles 30° Sleeping Bag

The Marmot Trestles 30° is the entry-level synthetic mummy bag in the Trestles line, tuned for milder three-season conditions. Its EN comfort rating of 2°C and limit of -3°C put it firmly in late-spring-through-early-autumn territory; the listed -20°C extreme figure is a survival threshold, not a comfort number. SpiraFil insulation keeps working when wet, so it holds up better than down against condensation inside a single-wall shelter. A full-length two-way zipper sits on the right side, a simple drawcord hood traps heat around the head, and an insulated draft tube limits heat loss along the zipper. Both shell and liner are 70D polyester with no DWR treatment, so the bag relies on shelter cover rather than direct rain exposure. At 1,380 g and 158 cm shoulder width, it's a straightforward value-versus-weight trade-off: the warmth-to-weight ratio trails the pricier bags in the range, but it's a solid, budget-friendly choice for weekend and week-long three-season trips.