An adventurous choice for high performance runners or keen hikers the trespass survey hydration running backpack allows you to store all the essential equipment and items in a large 18l outer zip compartment and use various added pouches for small items snacks and valuables the rucksack offers a highly stable and optimised fit with padded back as well as waist and chest strap system its compatible with trespass bladders and offers improved night visibility with reflective detailing featu