Using these Tifosi Alliant sunglasses is easy. Just put them on like you would any other pair of sunglasses. The adjustable ear and nose pieces allow you to customize the fit for maximum comfort. When you're out sweating during your workout, the hydrophilic rubber on the pads will grip better to keep the sunglasses in place. As for maintenance, use a soft, clean cloth to wipe the lenses regularly. Avoid using harsh chemicals as they can damage the lenses and the frame. When not in use, store the sunglasses in the included case to protect them from scratches and damage. Also, be careful not to bend the frame too much, as it may affect the fit and durability of the sunglasses.