This Brava Elastic Barrier Strip is used to hold the base plate in place for extra security and longer wear-time. It is designed to keep your base plate securely in place while still allowing you the freedom of movement which it achieves via its elasticity; so whether you are stretching for something on the top shelf or bending down to tie your shoe, you can rest assured the tape will move with your body and keep your appliance firmly in place which can mean better security and longer wearing time for your appliance.