hip bag with integrated hydration bladder . light, slim and reduced to the bare essentials: the hipster4. practical features such as a racelite airflow system with back ventilation, h2o compatibility and a self-fastening hipbelt with zipped pockets make this hipbag the ideal choice for short shredding sessions or all-day adventures. comes with a 1.5 litre widepac bladder from sourcemany materials and components of this backpack are either recycled, bluesign® certified or oeko-tex® certified.