The Mountain Equipment Helium 250 is an ultra-efficient, lightweight, and highly packable sleeping bag, ideal for warm-weather backpackers and tourers. It utilizes 261g of minimum 700-fill power DOWN CODEX-approved duck down and a high-performance, 100% recycled Helium 20D outer fabric. The slant-baffle construction enhances warmth, improves compressibility, and prevents down migration, ensuring consistent insulation and eliminating cold spots. A four-baffle footbox concentrates warmth around your feet, while a five-baffle hood design enhances comfort and keeps insulation precisely where it’s needed. The 100% recycled Supersoft 20D lining fabric with Fluorocarbon-free DWR provides breathability and durability. The full-length Gemini™ zip baffle minimizes heat loss and features a stiffened design to prevent snagging. The low-profile magnetic Lode Lock™ closure and collar drawcords allow for easy adjustments in the dark. Designed with a technical yet comfortable Alpine 2.0 fit, the Helium 250 maximizes thermal efficiency while keeping weight to a minimum. Its Good Night’s Sleep Temperature is 1°C (34°F). Temperature ratings: Comfort 7°C/45°F, Comfort Limit 2°C/36°F, Extreme -12°C/10°F. Dimensions: Length Inside: 180cm, Max User Height: 170cm, Weight: 600g, Pack Size: 19x17x15cm. Features: 100% recycled HELIUM 20D outer shell, 242g of 90-10 Pure Duck Down with a minimum fill power of 700, Women's Alpine fit with zoned EXL® system, Slanted box-wall baffles and stitch-through baffles, Mid-level side seams, 5 baffle anatomically shaped hood, 4 baffle anatomically shaped and offset foot-box, Full length Gemini zip baffle with 140cm zip and integrated neck collar with Lode Lock closure, 100% recycled Supersoft 20D lining fabric. Supplied with waterproof roll-top stuff-sack and storage cube.