hydration backpack by mountain designs - 10l leakproof hiking backpack has large compartments and 3l water bladder - running backpack and cycling backpack is a camping accessories must. mountain designs pro-elite stay hydrated while you hit the trails with our lightweight reload 10 hydro pack. with a high-strength ripstop nylon construction and durable water repellent (dwr) finish, it features a breathable mesh back panel, adjustable padded mesh shoulder straps, and a secure chest strap to support your movements. there are two accessories pockets to stash your valuables, and a reflective webbing strap for hanging items and enhanced visibility during night-time activities. the pack comes with a 3l bladder to get you hydrating straight away.