4-year warranty ,- two outer pockets made of stretchable mesh material for water bottles ,- padded, S-shaped shoulder straps with position adjustment straps for optimal fit to the back ,- height-adjustable chest strap ,- side compression straps to keep weight close to the back ,- detachable hip belt ,- padded carrying handle and additional hanging loop ,- padded, stable backpack bottom ,- 100% PFC-free coating ,- 100% PVC-free ,- all textiles are made from 100% recycled PET bottles (34 PET bottles per backpack) ,- climate-neutral balanced as well as socially responsible (Fair Wear Foundation) and responsibly produced (bluesign system partner)