Let the trail go on forever. Our Propel 70 pack is ideal for keeping you hydrated during road biking, trail running and hiking. The 2-liter hydration system has a wide opening reservoir for easy filling and cleaning. System is BPA free and antimicrobial. Product Features Large, front-load main compartment holds gear2-liter hydration system has a wide opening reservoir for easy filing and cleaning Hands-free reservoir pressure valve Separate, rear-access hydration reservoir compartment makes it easy to access your water supply Body Dimensions: 18.0" x 10.0" x 9.0"