Most runners want to travel light, so UltrAspire made the UltraViz Spry Hydration Backpack to answer the call. This sleek and simple pack has two front pockets, one zip key pocket, and a back sleeve for a hydration bladder or backpack. Despite all the storage capabilities for your snacks, it only weighs 4. 5oz, so you'll hardly even notice it. And if your snack habit takes up all the room, simply use the loops for your other accessories. The UltraViz Spry also has a limited stretch sternum strap and side webbing for comfortable carry from mile one to 1,001, and it'''s reflective enough to stand out.