The Leech sunglass strap is compatible with all sunglasses with regular ear pieces on the market. The floating strap is particularly convenient around water. The strap eliminates the fear of losing your valuable glasses, as it allows them to float on the surface if they happen to fall into the water. Pretty much a must-have for any boating or fishing enthusiast! And for anyone else who spends time on the beach or the water! Both ends of the strap feature rubber pieces that are pressed onto the ear pieces. The length can be adjusted.