✅【Ultralight Material,only 1.32lbs】: This bike backpack is with a capacity of 18L, weighing 0.6kg/1.32lbs.You can use it to carry 2L water bladder(NOT included) or to carry some small items,such as wallets,glasses,mobile phones,keys,torch etc.It brings you a low burden and relaxing riding. , ✅【Completely Breathable Design】: This running backpack uses breathable shoulder straps, making it fast dry when sweating. The double-layer breathable mesh padding applied on the back, bringing you an enjoyment of massage and helping reduce the friction between you back and the backpack. , ✅【Water Resistant & Durable】: This small backpack uses super diamond fabric, which is abrasion resistance and scratch resistance. Besides, the backpack fabric also has a water resistant effect, it can keep your items dry from the outside. , ✅【Foldable & Safe Reflective Tape】: This bike backpack can be folded in half, no crease,it's easy to store.The strap loop of this bike backpack is with reflective strip design, it can increase the safety at dark areas. , ✅【Widely Used】: As a sports and outdoor rucksack, it is suitable for a variety of sports activities such as cycling, running, walking, rock-climbing and hiking.