Roll-top closure makes it convenient to put in or take out your items. Adjustable bag capacity from 3L to 7L according to different needs.Webbing straps with buckles for easy adjustment and stability. Sturdy mounting system keeps bag securely mounted on the handlebar of your bike.Reflective logo increases your visibility to motorists in low-light conditions. Constructed of ripstop nylon fabric with double layer waterproof nylon TPU interior, keep your items dry even in rainy days.Also can be used as a dry bag after detached from your bike. Suitable for almost all bicycles, such as mountain bicycles, road bikes, folding bikes.