Size: Capacity - 3L Weight - 470g Size - 18'' x 7'' Description: 1) - Military hydration backpack made by high density Nylon material. 2) - Able to attached on any molle backpack, vest, duty belt or body armor. 3) - 1'' molle webbing throughout the backpack. 4) - Large filling port with secure seal. 5) - Bite valve design, convenient for switch on/off the flow of water. 6) - Comes with bite valve cover. 7) - Completely safe to use. 8) - With adjustable shoulder strap. 9) - Keep water cool for hours. 10) - Extra carrying space for storage. 11) - 3L hydration water reservoir is installed in the backpack. Package Includes: 1 x water bag Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.