The Big Agnes Sidewinder SL 20 Sleeping Bag is a high-quality sleeping bag designed for outdoor enthusiasts. With a temperature rating of 20 °F, this synthetic sleeping bag is filled with polyester insulation for added warmth. The long size offers extra room for those who prefer more space while sleeping. The durable nylon shell material ensures protection against the elements, making it ideal for camping and hiking adventures. While it is not treated with insect repellents, this sleeping bag is still a reliable choice for outdoor adventures in colder weather.