The Helium is a remarkably lightweight and compact sleeping bag from the brand Marmot, offering optimal insulation for three-season hiking or trekking. Featuring a Pertex® outer shell, 800 fill-power goose down insulation, and a Down Defender waterproof treatment, the Helium keeps you warm and dry throughout your night in the wilderness. After a long day of mountain hiking, you can rest your feet in the spacious and enveloping footbox of the Helium. The smooth, curved baffles keep the filling in place, while the multi-baffle Nautilus hood with drawcord, snag-free insulated draft tube, and two-way zipper with anti-snag slider minimize heat loss. If you wish to cool down slightly, the secondary fold-down zipper allows for ventilation. Additionally, the Helium is equipped with an internal stash pocket for safely storing your small valuables. Shape: mummy Seasons: 3 seasons Outer material: 100% recycled nylon Technology: Pertex® Quantum Lining: 100% nylon 30D Filling: 90/10 goose down Fill power (cuin): 800 cuin Down Defender impregnation Contains recycled materials - contains RDS-certified down PFC-free Comfort temperature: -3 °C Limit temperature: -9 °C Extreme temperature: -28 °C Ultralight and compressible goose down with certified 800+ fill power and eco-friendly ExpeDRY water-repellent finish, enhancing performance and durability with reduced drying time. The anti-snag slider on the main zipper and the second fold-down zipper provide additional ventilation and easy entry and exit from the sleeping bag. Anatomically designed footbox with wrap-around construction increases warmth. Smooth, curved baffles prevent down from shifting, improving the bag's durability and ensuring even warmth inside. ISO-tested for temperature and comfort reliability scale. Shoulder girth: 155 cm Hip girth: 142 cm Footbox size: 113 cm Packed dimensions: 36 x 18 cm Compression sack included. Marmot Helium - Regular: Recommended max height: 183 cm Bag volume: 7.5 L Fill weight: 560 g Sleeping bag weight: 984 g Marmot Helium - Long: Recommended max height: 198 cm Bag volume: 8.8 L Fill weight: 620 g Sleeping bag weight: 1,080 g Marmot Helium - Sleeping bag | Hardloop