Marmot Nanowave 45° Sleeping Bag

The Marmot Nanowave 45 is the warm-weather-focused end of the Nanowave line — the same Spirafil High Loft synthetic insulation that keeps working when damp, but a 13°C comfort rating and 10°C limit make clear this is a summer bag for lowland or lower-elevation trips, not cold nights. At 950 g, it's light for a synthetic bag, and its 95 g-per-degree weight-to-warmth ratio is among the better figures in the Nanowave range. Construction mirrors its cooler siblings: 50D polyester shell with a DWR finish, full-length two-way zipper, and a draft tube to limit heat loss at the zipper — the same build, just with a thinner insulation layer. Materials are PFC-free, and a stuff sack is included. For hikers who want synthetic's wet-weather reliability — useful on trips where rain or tent condensation is a given — without carrying reserve warmth they won't need, the Nanowave 45 is a sensible pick. Sized for unisex fit up to 182 cm.