The perfect pack for day hikes and trail runs with your dog. The lightweight Hydropack I from Singing Dog Designs features two easily accessible, shock-cord secured, BPA- and phthalate-free water bottles constructed of squeezable plastic. Designate separate water bottles for you and your slobbery friend with their soft, color-coded spouts (only bottles in M, L, and XL are color coded). The fully adjustable, three-dimensional, curved and contoured harness is dogonomically-designed to fit your canine"s chest and keep the pack from rotating on your dog"s back. A flexible plastic stay helps spread and distribute the load for comfort.