Nathan | LightSpur | Unisex arm band providing a Custom-Like Fit and

providing a Custom-Like Fit and reduced risk of blisters

Closed-cell foam supports and cushions the foot for long-lasting comfort

enhance foot and toe strength and flexibility

general knee pain

Nathan | LightSpur | Unisex arm band providing a Custom-Like Fit andQuickly 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.