Hydration Pack with 2 L Backpack Water Bladder and Cleaning Kit. Great for Biking-hiking-trail Runners Cushioned, breathable mesh back panel with adjustable shoulder, chest, and waist straps. 5 storage compartments, 3 mesh, one 12 & 8" deep pockets to store snacks, phones, iPad and any other essentials Comes with safety built-in whistle, reflectors ideal for trekking, hikes, cycling, jogging Includes a set of cleaning brushes for the replaceable BPA free 70 oz (2 Liter) hydration bladder Bag design with special earbud outlet for easy access when you hit the trails - Comes with a "Free Runner's Guide Ebook