What Our Gearhead(R) Experts Are Saying:"I like the Radeon 20F for spring-fall trips when the weather can't make up its mind. The Stratus insulation holds warmth in damp conditions, and the WARM WAVE construction gives the bag better loft than most synthetics. It's durable, comfortable, and a great everyday trekking bag."We count on the Radeon 20F Sleeping Bag when cool nights and unpredictable weather are part of the adventure. From weekend camping trips to steady backpacking miles, it delivers dependable warmth with a durable synthetic build that doesn't blink at moisture or rough handling. The Radeon uses recycled Stratus(TM) synthetic insulation arranged in a WARM WAVE(TM) concertina structure that traps air efficiently without adding weight. A tapered mummy shape boosts heat retention while sidewall baffles increase loft and comfort for side sleepers. The recycled Atmos(TM) ripstop shell resists moisture and abrasion, while practical details-like an anti-snag zipper system, a 3D neck collar, and an internal stash pocket-make nights in the backcountry more comfortable and organized.