Waterproof Hydration Pack with Removable 70 Oz - 2 L Backpack Water Bladder. Fits Men and Women with Chest Sizes 27" - 50". Great for Hiking - Running - Biking REPLACEABLE 70Oz. BLADDER: Never worry about dehydration with our FDA approved, food grade 70 Oz. BPA-Free leak-proof bladder. The wide screw cap enables you to add ice cubes for an even cooler drink. Enough to get you through a day of hiking, cycling, running or biking GOOD VOLUME: Includes storage compartments that will fit your clothes, iPad, phones 11" -12" laptops and even a DSL camera. For even more storage, the side pockets allows you to pack even more on your hike, mountain bike. ULTRA-LIGHT YET RESISTS WEAR AND WATER: The main compartment is covered with our own diamond Rip Stop Nylon material which serves two functions. It is water resistant so your belongings stay dry in light/medium rain. It is also durable reduces wear and tear so your pack lasts longer PERFECT FIT GUARANTEED: Adjustable shoulder/chest straps. Will fit chest sizes from teenagers / kids with 27" up to adults (men and women) with 50" chest size. The chest straps make sure it doesn't bounce when you move. 100% SATISFACTION GUARANTEE: If for any reason you are not 100% satisfied with your DoMore Hydration Pack, please let us know and we will immediately refund your purchase price - no questions asked.