2-litre hydration bladder with bite valve - works with most hydration rucksacks (backpacks). Made from tough-wearing TPU with capacity markers for measuring your intake. Ideal as a spare or replacement. Features and Benefits Taste-free bite valve for easy drinking Litre and ounce capacity markers Fits most hydration packs Specifications Dimensions: H:38.0 x W:17.0 cm Colour: Blue Guarantee:1 year Material: Low Density Polyethylene 1%, Silicone 2%, Polyethylene 2%, Polypropylene 5%, Polyvinyl Chloride 10%, Thermo Plastic Polyurethane 80% Model Number: EU159 500000