Backpack Bags

A backpack—also called knapsack, rucksack, pack, booksack, bookbag, haversack or backsack—is, in its simplest frameless form, a fabric sack carried on one's back and secured with two straps that go over the shoulders; but it can have an external or internal frame, and there are bodypacks. a pack or knapsack, often of canvas or nylon, to be carried on one's back, sometimes supported on a lightweight metal frame strapped to the body. a piece of equipment designed to be used while being carried on the back. Backpacks are a better option than shoulder or messenger bags for carrying books and supplies.