Mammut Nirvana 30 Backpacks | Absolute-Snow。 Nirvana 15 is a minimalist ski touring and freeride backpack, but with all the high quality details you may need! There is a shaped compartment to protect the ski mask, there are the ski and helmet holder, the attachment for the avalanche safety equipment and the SOS label with the instructions to follow in case of emergency. To stay hydrated, you can connect the hydration system and to have access to the 15 liters at your disposal there is a very convenient zipper on the back. , very attentive to environmental sustainability, has made Nirvana 15 in 75% recycled polyester. The backrest and shoulder straps are padded with 2-layer high-density EVA, covered in stretch fabric: very comfortable to wear!