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.