Therm-a-Rest Questar™ 20F/-6C Sleeping Bag

The Questar 20F/-6C is a three-season mummy bag rated to 0°C comfort and -6°C limit under EN ISO 23537, lighter and less bulky than its 0F/-18C winter sibling. The fill is 540 g of duck down at 650 fill power with Nikwax Hydrophobic Down treatment and RDS certification for responsibly sourced down. Total weight of 990 g (Regular, up to 183 cm) puts it in the standard three-season bracket — not ultralight, but a reasonable warmth-to-weight compromise for spring through autumn. A 20D polyester shell with DWR treatment and a 20D polyester taffeta liner keep weight down, and box-baffle construction limits down migration. The hood cinches with a simple drawcord, while a draft collar and draft tube reduce heat loss around the zipper. The manufacturer notes a Toe-asis foot-warmer pocket for cold feet and SynergyLink loops to anchor the bag to a pad. The lack of an internal pocket and foot-box ventilation found on pricier bags in the line is a minor trade-off. Suits hikers wanting a dependable bag for cooler nights without winter-level bulk.