This is the Oceanic Accel Open Heel Scuba Diving Snorkeling Travel Fins Features: Unique heel strap design is effortless to slip on and off Angled, compact blade has excellent water flow characteristics Design allows divers to swim efficiently with multiple kicking styles Dramatically reduces the bulk and drag associated with typical open heel fin Weighs less than 3 lbs per pair Maximum length (size XL-XXL) only 21 inches Available in bright, dynamic colors! Customize your Accel fins with any of 6 color kits (sold separately) If you favor power over frills, you&';ll love the Accel. Compact and responsive, its clean lines and efficient shape make it an excellent all-around fin. The blade&';s center channel, along with pronounced side rails, also helps minimize "side spill," directing water behind the diver for maximum thrust.