Stretch Fins Straps can be used on compatible Tilos Fins to replace the adjustable buckle system. The Stretch Fins Straps eliminate the need to tighten your fins once you put them on. To remove the fins you do not need to find a buckle release. You just grab the strap and pull it off. Ideal for divers who are doing surf entries because you don't need to mess with adjustments while in the surf zone.