This is the Cressi Elastic Bungee System Stretch Straps for Cressi Scuba Diving Fins Features: Cressi has developed this special strap to meet the needs of the most demanding divers Its special amply sized slot makes it very easy to put on, even when wearing thick gloves or three-fingered gloves for winter water The wrapping section is highly flexible, making adjustments unnecessary Cressi has developed this special strap to meet the needs of the most demanding divers, who need a comfortable fastening for their foot but one that is still practical and manageable. Its special amply sized slot makes it very easy to put on, even when wearing thick gloves or three-fingered gloves for winter water. The wrapping section is highly flexible, making adjustments unnecessary, and as a result it&';s much easier to get all your equipment right in the first few meters of your descent and the fin stays in place against your foot despite the increase in hydrostatic pressure.