Come and Check Our Branding Solutions.The 5L hydration backpack with 2 Liter (0.5 Gallon)PVC BPA FREE Water Bladder include features fully adjustable shoulder, waist straps, a padded mesh back, it will fit almost all chest sizes. The bladder prevents all leaks. The air flow system prevents sweating, provides comfort. Intelligent storage of two layers design avoids being bulky, perfect for cycling pack, running. External bungee straps are for additional carrying. Small front zipper pocket are for keys, compass, phones, snakes etc. Pls check inventory and detailed info before placing your orders.