The outer shell is impregnated with Bionic-Finish Eco. This water- and dirt-repellent technology is PFC-free and environmentally friendly, offering better durability and sustainability. The Hyperion 1 M is a high-quality, functional 3-season sleeping bag (spring, summer, autumn) in mummy shape with a wide range of applications. It is perfect for camping, hiking, trekking, backpacking, and mountaineering. The premium Dura Loft 3D spiral synthetic filling provides excellent insulation. The spiral hollow fibers are durable, thermally sealed, and additionally silicone-treated, allowing them to retain their loft and compressibility. The ripstop nylon outer shell is lightweight, smooth, and extremely robust, with no seams at the bottom to reduce cold bridges. It features super soft, skin-friendly, and breathable ripstop nylon. The adjustable 3D hood design keeps the head and shoulders warmer at night. The full-length two-way zipper allows for opening the foot area for air circulation, and the zipper cover reduces cold bridges for optimal insulation. The anti-snag zipper protection prevents the zipper from catching on the lining, and the auto-lock feature prevents the sleeping bag from opening while sleeping. The ergonomically shaped foot area provides extra space for more freedom of movement and comfort. The ergonomically designed zipper pull makes it easy to grab. An inner zipper pocket offers practical storage for small items. The compression sack minimizes the packing space. The maximum user height is 180 cm. Machine washable at 30°C.