Addidas says 

Summit scramble, speed hike or alpine adventure, this adidas Terrex hiking pack offers technical performance in a small, lightweight design. Air mesh shoulder straps and a 3D-molded back panel maintain a body-hugging fit that manages sweat to keep you cool, dry and focused on the trail. Multiple pockets keep essential gear within reach, and technical details including webbing loops and metal toggles let you secure skis, hiking poles or ice axes. A wide u-shaped opening offers easy access to the main storage. This product is made with at least 70% recycled materials. By reusing materials that have already been created, we help to reduce waste and our reliance on finite resources and reduce the footprint of the products we make.