This 20L Cycling Backpack includes many compartments to provide roomy storage space for your items. It is made of premium nylon fabric which makes the backpack lightweight, water-resistant and tear-resistant. The adjustable shoulder straps and padded mesh back are comfortable, reflective elements are safe for riding at night and the mesh cover holds your helmet. With a rain cover, you'll never worry about your valuables ruined in rainy days. It is a great sport backpack for all kinds of outdoor activities such as cycling, camping, climbing, hiking, traveling, etc.Features:Premium nylon fabric is lightweight, water resistant and tear resistant.20L cycling backpack includes a main compartment,a front compartment with multiple pockets,two side mesh pockets,a detachable phone pouch and two waist pockets,provide roomy space for your belongings.Easy to store the mesh net and rain cover in the front storage pocket.Mesh net with fixed hook can hold your helmet.Included a rain cover to protect the backpack and your essentials in heavy rain.Reflective strips around the bag,provides more safety during your nighttime activities.Water bladder compartment with fastener tapes and convenient water outlet with fixed clips,you can easily drink water easily during activities.Breathable mesh padded back,adjustable mesh padded shoulder straps,flexible sternum strap and adjustable waist strap.which distributes weight effectively and provides comfort and breathability.Whistle on the sternum strap for emergency situations.Suitable for cycling, camping, hiking, mountaineering and other outdoor activities.Specification:Color：Black/Green/Blue/Red (optional)Material: NylonCapacity: 20LWeight: Approx.830g/29.3oz (1.8lb)Size: 47*16*28cm/18.5*6.3*11.0inPackage weight: Approx. 850g/30.0ozPackage List:1* Bag1* Rain CoverNOTE:1.The bag only,the others are not included.2.Item color displayed in photos may be showing slightly different on your computer monitor since monitors. Thank for your understanding.