The Mountain Warehouse Bolt Backpack, with a capacity of 18L, is a sturdy and durable pack constructed from 100% polyester ripstop fabric. Measuring 43cm in height, 30cm in length, and 13cm in width, this breathable backpack offers ample space for your essentials. Key features include an air mesh back for enhanced comfort, bungee straps for additional storage options, compression straps to secure the load, and a hydration bladder compatible design. The padded back and padded straps ensure a comfortable carry, while the shoulder strap provides added convenience. Inside, you'll find a main compartment, a bottle holder, and multiple pockets for organizing your items. This backpack is heavy-duty and suitable for various outdoor activities, but please note that the hydration bladder is not included in the package.