With a 2 litre hydration reservoir included this ultra-lightweight Vango Sprint 7 Daysack is perfect for keeping you hydrated while you are cycling running kayaking & enjoying other outdoor activities The Spirit 7 has been made from a durable & lightweight fabric & has an Air Mesh back system with a ventilated mesh harness & straps to keep this pack as lightweight & comfortable as possible making it ideal for energetic activities There is a sternum strap & a detachable waist strap that will offer a secure & personalised fit & this pack has a 2 litre hydration pack included in a separate Velcro d pocket situated at the back of this rucksack There is also a main zipped pocket ideal for carrying all your essential outdoor gear a small zipped front pocket & a shockcord accessory cord on the front