13"*20"*11" / 33*50.5*28CM (W*H*D),Capacity: 40L; Military backpack is made of high density fabric--durable and water-resistant Molle tactical ... Military backpack has hydration compatible ...

When you buy through our links, we may earn a commission. Learn more› By Jenni Gritters A hydration pack—that is, a backpack with a built-in water reservoir—makes it easier to stay hydrated ...