The classic Croakie is the best selling sport retainer sold in over 30 countries throughout the world. Designed ski patrolman at the Jackson Hole Ski Resort in 1977, Croakies has come a long way from the original design. What makes Croakies stand out from it's competitors? It's their use of top-quality neoprene or HyPUR-cel and the patented backstitching technique, which retains firm elasticity and prevents threads from unraveling over time.Regular fits most sunglasses, get XL for those fat temples, like on a Wayfarers.