The Defender 15 Hydration Backpack is the ultimate outdoor companion for MTB, Moto, Snowmobiling, and more with a 15-liter capacity, perfect for mountain trails, snowy slopes, and more. Equipped with a removable spine protector and a 2-liter hydration bladder, it ensures safety and convenience.,The Defender 15 Hydration Backpack is the ultimate outdoor companion for MTB, Moto, Snowmobiling,