The Big Agnes Sidewinder SL 20° Sleeping Bag, in a long size, is a revolutionary sleeping bag specifically engineered for the unique comfort needs of side sleepers. Unlike traditional mummy bags that can restrict movement and cause cold spots when you roll over, the Sidewinder SL’s patented design is patterned to move seamlessly with your body. The long version is designed to fit users up to 6’6″ and is filled with a blend of 650 fill DownTek™ water-repellent down and synthetic FireLine™ ECO insulation, which provides excellent warmth, compressibility, and moisture resistance. Key features like the jacket-style hood and body-mapped insulation ensure warmth is optimized and pressure points are minimized, making it a “side sleeper’s dream bag” for 3-season backpacking.

Key Features:

Side-Sleeper Specific Design: Patented design with a technical fit that is patterned to move with you as you roll from side to side, preventing twisting and cold spots.
Insulation: A blend of 650 fill DownTek™ water-repellent down and FireLine™ ECO synthetic insulation. The down offers superior warmth-to-weight, while the synthetic fill is strategically placed to alleviate common pressure points in the hips and feet.
Warmth & Temperature Rating: Rated for 20°F (-7°C), making it a reliable choice for 3-season camping and backpacking.
Hood & Pillow Barn: A close-fitting, jacket-style hood keeps insulation close to the body, and a unique Pillow Barn keeps your pillow in place all night.
Thoughtful Construction: An anti-snag, ambidextrous zipper ensures smooth operation, while a no-draft collar seals in warmth.
Long Size: Designed for taller individuals, fitting users up to 6’6″ (198 cm).