Top layer delivers long lasting odor control

and is ideal for use on the inside of thighs

designed to relieve discomfort caused by Runner’s Knee

Superfeet’s proprietary carbon fiber & polymer blend

All-Day Protection

Nathan | LightSpur | Unisex run fast Top layer delivers long lastingQuickly 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.