5-Layer waterproof fabric in a fully seam-sealed construction

SKS stands for "same key system" so you can make it quick and easy unlock and get riding

It has a long-lasting external battery pack and comes with both a bar mount and helmet mount for mounting versatility

It will fit most mountain bikes and attaches with velcro straps for a secure fit

O-ring mounting for versatile mounting options

TLD Flowline SE MIPS Helmet - M-L - Badge Olive - Indigo Needs Images 5-Layer waterproof fabric in aDETAILS Be sure to stay safe on your bike rides with the Flowline SE Helmet from Troy Lee Designs. This half shell helmet seamlessly combines safety, comfort and style. Enjoy reliable impact absorption and a breathable airflow system with the helmet's design. Plus, the easy to use magnetic buckle ensures a secure closure every time. Conquer the mountain bike trails, or city streets, with the Troy Lee Designs Flowline SE Helmet. SPECIFICATIONS 3 Way