Item Type: Adventuring Gear

Item Rarity: Common

Requires Attunement: No

D&D Beyond: Backpack

Source: Player's Handbook

A backpack is a leather pack carried on the back, typically with straps to secure it. A backpack can hold 1 cubic foot/30 pounds of gear.

You can also strap items, such as a bedroll or a coil of rope, to the outside of a backpack.