Therm-a-Rest Polar Ranger Sleeping Bag Review: Engineered for Extreme Cold and Expedition Reliability
The Therm-a-Rest Polar Ranger sleeping bag is designed for serious cold. Rated to -30°C (-20°F), it’s built for expeditions, high-altitude camps, and deep-winter bivvies where warmth is not optional. Developed in collaboration with polar explorer Eric Larsen, this bag is packed with features that go beyond standard cold-weather designs. It’s not a general-purpose sleeping bag—it’s…
