Come and see our amazing products. You can barely feel yourself carrying it while cycling or running or hiking. Keep your body in top shape while exercising. Made of rugged nylon with polyester ripstop lining to ensure high durability of the backpack.Free 2L water bladder is made of food-grade certified material.The oversized screw cap,4.5cm in diameter, makes it easy to remove, wash or fill with ice. And don't worry about loosening or leaking.Plus,with internal insulation,it keeps the liquid cold for up to 4 hours,making it easy to rehydrate during workouts.This hydration pack can give you long-term hydration needs,which is perfect gift for your friends and customers.Please add your logo or company message on the body of the items.It will make a great chance to expand your company's brand and awareness. Pls confirm further with us if any query about packing info, inventory status and time schedule.