VBIGER Hydration Pack Cycling Backpack with 2L Water Bladder for Hiking Running Biking Lightweight nylon with high density, restrict to water, scratches and abrasion; 100% brand new and good working condition. 5L backpack with 2L hydration bladder to keep you hydrated on the go, roomy for holding your iPad, cell phone, keys and umbrella as well as. Smart reflective strip design on shoulder straps for your safety at night. Thin and adjustable mesh shoulder straps, providing travelers and riders with the flexibility and pressure reduction. Ergonomically designed with breathable padded mesh air diversion system on the back, bringing users the most relaxed massaging comfort.