New Universal Replacement Scuba Diving and Snorkeling Fin Straps - One size Fits All and Can be Used with Most Major Brands (Gray) Unique, high-stretch strap design dramatically reduces the bulk and drag of typical open heel fins, all while being effortless to slip on and off. Adjust to thicker or thinner dive boots as necessary. Heavy duty high-tech stretch rubber Weighs substantially less than stainless steel spring straps Patented hole system makes installation exceptionally easy and secure