This insole is suitable for sports and protects the heel and sole of your feet, absorbing sweat and odor reducing foot sweat keeping your feet fresh all day long Suitable for all types of casual or everyday footwear. Great for jogging, running, hiking, basketball, soccer, cycling, golf, tennis, etc. Instructions for use Remove the existing insole from your shoe and place the new insole back-to-back with the existing insole. If your original insole is shorter than the new insole, you can trim the contour along the bottom of the new insole so that it matches the size of your current insole. Insert the new insole into your shoe (do not put both the new insole and your current insole into your shoe, as this will be too thick and wide).