The Therm-a-Rest Questar 0°F / -18°C Small Sleeping Bag is a feature-rich, high-value down mummy bag built specifically for cold-weather winter backpacking and camping. The "Small" designation indicates it is tailored for shorter adults, youth, or campers up to 5 feet 6 inches tall (168 cm), saving unnecessary packed weight and bulk by eliminating dead air space.

Unique Performance Highlights

• W.A.R.M. Fit Profile:
  "With Additional Room for Multiple positions" – This design provides a slightly wider, less restrictive girth through the shoulders and hips than traditional mummy bags. It allows side-sleepers or restless campers to twist and turn naturally without pulling the bag taut or compressing the insulation.
• SynergyLink Connectors:
  Features ultra-lightweight, removable elastic straps that wrap directly around your sleeping pad. This anchors the bag safely in place so you cannot slide off your mat onto the freezing tent floor during the night.
• Zoned Insulation & ThermaCapture Seams:
  Minimizes weight by focusing more down fill on the top and sides of your body where you need it most. The bottom relies primarily on your sleeping pad's insulation, while specialized heat-trapping seams retain radiant body heat.
• Toe-asis™ Foot Warmer:
  Outfitted with a dedicated, baffled pocket of thick insulation tucked inside the footbox to rapidly warm up cold feet.
• Nikwax Hydrophobic Down:
  Packed with 650-fill-power duck down that has been treated to absorb 90% less water and dry 3 times faster than standard down. It maintains structural loft and insulating warmth even when exposed to heavy winter tent condensation.

Specifications at a Glance

• Temperature Rating:
  0°F / -18°C ISO Lower Limit. (The ISO Comfort rating for cold sleepers sits right around 14°F / -10°C.)
• Maximum User Height:
  Fits sleepers up to 5'6" (168 cm). Total bag length is 73 inches (185 cm).
• Weight:
  Light for a winter bag at 2 lbs. 9 oz. (1.17 kg).
• Materials:
  20D ripstop polyester shell with a durable water-repellent (DWR) coating and a smooth 20D polyester taffeta lining.
• Hardware:
  Features a full-length anti-snag zipper, a puffed, insulated draft collar, an external zippered pocket for phones/headlamps, and a cinchable hood.