Nathan | LightSpur | Unisex size:OSFM as well as give you

as well as give you instruction for improving your running form

the FS6® fits seamlessly under socks and inside shoes

Rechargable & 10 hours of battery life

and a soft hand feel that improves with wear

Patellar Tendonitis

Nathan | LightSpur | Unisex size:OSFM as well as give youQuickly and securely attaches to heel of your shoe Super lightweight so you don't feel a thing Multi settings for high visibility and added safety Waterproof so you can run longer in any weather Easily replaceable watch battery offers 100+ hours of illumination Usage Instructions: Press and hold power button for 2 3 seconds to turn on. Press again to switch between steady and strobe modes. Press and hold power button for 2 3 seconds to turn off.