Therm-a-Rest Space Cowboy™ 45F/7C Sleeping Bag

The Space Cowboy 45F/7C is a lightweight summer synthetic bag for two-season (spring/summer) use, rated to 11°C comfort and 7°C limit — suited to lowland camps and warm nights rather than higher elevations or early spring. The 650 g eraLoft fill keeps total weight to 793 g, a solid figure for synthetic insulation in the summer category, though still heavier than a down bag with comparable warmth would be. Both shell and liner are 100% recycled nylon ripstop, a point in its favor for hikers weighing the environmental footprint of their gear. A two-way zipper allows foot venting on warmer nights, and a draft collar plus draft tube limit heat loss even in this lightweight summer build. SynergyLink loops anchor the bag to a sleeping pad. It packs to 25 × 20 cm, with both a compression sack and storage sack included. The synthetic fill is low-maintenance and keeps working when damp — a sensible choice for light summer treks where low weight matters but freezing conditions don't come into play.