1.Hard Shell EVA and PU material,Resist Pressure shock absorption
2.EVA hard shell shock absorption, protect items and bicycle tubes
3.Double zipper Design,Can be connected to the charging line and Headphone cable
4.Streamlined three-dimensional shape, Reducing wind resistance
5. Trimmable velcro for a variety of different Bicycle frame, free to trim length
6.Rainproof fabric,It can prevent light rain, but it can't be exposed to the heavy rain for a long time and Direct soaking water