The Mountain Warehouse Ventura Backpack offers a spacious 40L capacity, crafted from 100% polyester. Measuring 57cm in height, 37cm in length, and 18cm in width, it boasts an adjustable chest strap, an airflow back system for comfort, compression straps to secure your load, curved shoulder straps for a perfect fit, and a hydration bladder compatible design. Additional features include a padded hip belt, a raincover, walking pole holders, and multiple compartments including one specifically for boots. However, please note that the hydration bladder is not included in this purchase.