RELIABLE & DURABLE MATERIAL: 13. 5 x 7. 5 x 2. 1 inches, Capacity: 3. 5L; The Tadpole Hydration Pack is made of high density durable polyester fabric RESERVOIR INCLUDED: 1. 5L reservoir to keep you hydrated while enjoying the outdoors COMFORTABLE & FUNCTIONAL: Heavy duty zippers and utility-style cord pulls, top carry handle, compression straps and lightweight and breathable mesh shoulder straps LOTS OF STORAGE SPACE & POCKETS: The Tadpole Hydration Pack is the best addition to your adventure. It features a roomy compartment, top stash pocket for quick and easy access to accessories and a front compartment with key clip. LIFETIME GUARANTEE: Backed by the Outdoor Products Plain + Simple Lifetime Manufacturer's