The Blackfell Hydro Pack 20 Litre from Regatta is a fantastic mini-expedition durable rucksack with a hydration reservoir making it a perfect companion for a day out on the hills or long walk in the great outdoors The lightweight Blackfell Hydro Pack offers a comfortable & personalised fit thanks to its padded air mesh back panels adjustable chest harness & adjustable hip belt It also comes complete with a 2 Litre hydration bladder in its own little pouch in the main compartment of the rucksack & it has a front bungee storage system making it an ideal daysack to keep you hydrated & to carry your essentials on a long hiking adventure