brand new caterpillar performance hydration backpack i have a few available 40$ pickup! Be prepared for any adventure with the CAT Performance Hydration Backpack. This large capacity day trip backpack is made to accommodate long treks by keeping you hydrated with its 2-liter hydration bladder and comfortable with its adjustable side straps and padded back. The stretchable mesh exterior pockets adapt to hold a variety of accessories and there is even a safety whistle attached to the chest strap for ease of access. Wherever you are deciding to travel next, this backpack will ensure you can spend your time exploring without worrying about whether you are prepared. 2l Hydration Bladder Water-resistant Fabric Built-in Safety Whistle On Chest Strap Padded Back & Adjustable Side Straps For Individualized Comfort Areas For Trekking Attachments 7 Zippered Outside Pockets Stretchable Mesh Exterior Pockets For Accessories