The outer shell is impregnated with Bionic-Finish Eco. This water- and dirt-repellent technology is PFC-free and environmentally friendly, while also providing better durability and sustainability. The Hyperion -5 M is a high-quality, functional mummy sleeping bag designed for three seasons (spring, summer, autumn) with a wide range of applications. It is perfect for camping, hiking, trekking, backpacking, and mountaineering. The high-quality Dura Loft 3D spiral synthetic filling offers excellent insulation performance. 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 strong, with no seams at the bottom to reduce cold bridges. It is made from 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 inner 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 easier to grip. An inner zip pocket offers practical storage for small items. The compression sack minimizes space requirements. The maximum user height is 195 cm. Machine washable at 30°C.