Keep the kids well-hydrated on a day hike or fun sporting adventure with this fun, light pack! The Tadpole Hydration Pack is made of high density durable polyester fabric and includes a 1.5L hydration reservoir. eavy duty zippers and utility-style cord pulls, top carry handle, compression straps and lightweight and breathable mesh shoulder straps. 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. The hydration pack is backed by our plain and simple lifetime guarantee.