knapsack
/ˈnæpˌsæk/
noun
- A bag with shoulder straps, carried on the back, used for hiking, travel, or carrying supplies.
- The soldier carried a heavy knapsack filled with gear during the march.
- She packed her knapsack with water, snacks, and a map for the hike.
- He slung his knapsack over one shoulder and headed out the door.