Reaching the objective of ultimate comfort! Specifically crafted with an invisible self-adhesive, bacteria-resistant, and hypoallergenic cushioning gel for excellent impact absorption. It helps distribute pressure, minimizes friction, and reduces rubbing on the back of your heel and Achilles tendon. Perfect for preventing blisters, chafing, and bumps on the back of your heel. The advanced anatomical wavy design provides comfort, cushioning, and protection to the sensitive Achilles area while enhancing the anti-slip feature.