Product details:

Black Diamond Distance 4 Hydration Pack Black Diamonds four litre Distance 4 Hydration Pack is a superb way to carry the essentials needed on fast-moving adventures such as ultramarathons and trail races. Despite its incredibly low weight it doesnt lack features, with a BD.Dry device pocket, secure pocket and dedicated bladder sleeve all available. There are also two 500ml Soft Flasks included and zipped chest pockets along with an expandable storage back pocket so its easy to organise nutrition, hydration and spare layers for easy and quick access. There is the capacity to carry trekking poles on the pack without having to remove it to access them on the go and the 4-way Stretch Vapor Mesh construction keeps it feeling light and airy at all times. Black Diamonds BD SET (Stitchless Edge Taping) Technology removes potential chafe points whilst the double sternum straps hold the pack firmly and comfortably in place across even the most difficult terrain.