Details *Features*: ** 3L Lager Capacity*:Built-in with a water bladder,easy to add water;just open the cap of water bladder. ** Waterproof Durable Materials*:Constructed by waterproof 600D high-density Nylon material,tear-resistant,abrasion- resistant and durable. ** Switch ON / OFF Bite Valve*:Large filling port with secure seal. Bite valve design,convenient for switch on/off the flow of water. Equipped with a tube with a bite valve to drink,so you don't need to stop and hold it to drink. ** Humanized Design*:Slender and portable design with middle handle strap,adjustable webbing chest strap and shoulder straps,partaking the load when carrying heavy loads. ** Adjustable Shoulder Strap/Chest Belt*:With hand carry strap and adjustable shoulder strap,so you can adjust it to the most comfortable position,suitable for heavy carrying and longtime exercise,walking. **Note*: *1. In order to avoid water leak,before using the water pack,please screw the tube with bladder. *2. Do not overfill the bladder with water,and tighten the back lid to prevent water flowing out. *3.Please allow little differences due to manual measurement. *4.Please allow little color variation for different display setting. *Specifications*: Product Type: Hydration Backpacks Water Bladder Bag: 3L Material: Nylon + TPU Size: Approx. 45 x 21cm (L*W) Backpack Usage: Normal Camping & Hiking Color Available: Jungle, Military, Acu, Khaki, Black Item Size: 45.0cm x 20cm x 7.0cm/17.7 x 7.87 x 2.75inches Item Weight: 376g/13.22oz *Package Lists*: 1 x Water Bottle 1 x Bottle Holder Bag View detailed description View detailed description View detailed description