This 25L insulated hydration backpack measures 10.83 x 3.55 x 9.06 inches and includes a 2L Tpu water bladder for hikes, runs and other outdoor activities. The pack has room for water and personal essentials, while the large bladder opening makes filling and cleaning more convenient. A bite valve with a dust cap supports on-the-go drinking, and the polyester body is suited to everyday outdoor carry. Adjust the pack for a comfortable fit and clean the bladder according to the care instructions.