These Endoto Inserts are designed to be compatible with Crocs (both lined and unlined clogs), and they are also compatible with other brand or non-branded clogs. They provide extra warmth, allowing you to wear your clogs comfortably during winter or colder weather. Our inserts offer two flexible usage options to suit your needs. For Unlined Clogs: Simply place our inserts inside your clogs for an instant boost of warmth and comfort. They're easy to use, providing a snug fit and ensuring your feet stay cozy even in chilly conditions. For Lined Clogs: Replace your old liners with our new inserts to give your clogs a fresh update. (Important Note: Removing the original liners may be difficult. We strongly recommend you check and remove the existing liners before purchasing to ensure proper installation and replacement of the new inserts.) Package Contents: Each package includes 1 pair of inserts, 4 pairs of rivets, and a user manual. The installation is hassle-free with our easy-to-follow guide. The inserts feature side holes and rivets to securely hold them in place, preventing them from slipping out or wrinkling during movement. Dedicated Customer Service: Let our inserts help you enjoy wearing clogs even in the winter! We are committed to delivering the best experience and continually innovate to meet diverse footcare needs. If you have any concerns, don't hesitate to reach out to us. NO