Necessary Dont let the pain get in your cycling a good cushion can bring a better experience to your cycling.Anti slip the bottom of the cushion is provided with antiskid glue to ensure that the cushion will not slide at will after installation!The gel seat with An adjustable draw cord 11.3 x 7.5 inches suitable for most standard narrow small or medium bike seatsUsing advanced gels Intermediate groove desn fortable and breathableOur package contains bicycle reflective stickers which are attached to your bike to increase the safety of riding!