Material900D polyester. 24.5*10cm(diameter). It weighs only 160g Large capacityIt has a capacity of about 2.4L, can store mobile phone, wallets, keys, bike repair tools, gloves, etc. The design of the top horizontal zipper design is convenient for taking items during riding. Front elastic strap can hang wet clothes. Simple installationUse three removable velcro straps to fix the bag on bike. Removable shoulder strap makes it easier to carry with you. Ensure your safetyIt has 6 points reflective strip, and will not block the lights, code meter, mobile navigation, etc. You don't have to worry about riding at night. OccasionCommuting, cycling, outdoor sports, business travel, etc. Suitable for road bike, mountain bikes and folding bikes. AccessoriesAdjustable shoulder strap*1, velcro strap*3