RUPUMPACK Cycling Hydration Backpack with 2L Water Bladder, Insulated Lightweight Bicycle Pack for Men Women Kids Biking Hiking Running

Comfortable & Ventilated: Unique air back panel allows air to circulate better, keeping your back cooler; Softer shoulder strap padding keeps your shoulders more comfortable. The secure and adjustable straps keep the backpack from shifting and swinging while biking. Convenient cycling backpack: Bike helmet attachment easily and securely carries bicycle helmets. The front pocket made with fiber flannelette can avoid scratching your sunglasses. Safe biking backpack: There are 2 long reflectors in front of the backpack, and the short reflective patch can be attached a blinker light, making riding safer at night. And there is a safety whistle on the chest strap that can be used in an emergency. Insulated hydration backpack: With a hydration insulation layer, it can keep liquid cool up to 4 hours. Backpack comes with a BPA free 2L water bladder, keeping you hydrated during one day's hiking. Sturdy & Durable & Versatility: High density water-resistant nylon material, double-stitches, adjustable straps, SBS double zippers, this daypack is durable and reliable in daily use. It's also perfect for hiking, cycling biking, running, camping, climbing, skiing, Spartan Race, Disneyland, music festivals.