Finis Rapid Monofin\r\nThe Rapid monofin is a recreational monofin designed for teenagers and adults. The patented large single-blade teaches swimmers a proper undulation in the water, while obtaining a great core and leg workout. The Rapid’s flexible blade makes swimming more enjoyable as users can swim at greater speeds and depths. The Rapid is a versatile monofinthat can be used in a pool, lake or ocean and comes with adjustable heel straps that can be fitted to various sizes. The Rapid also comes with quick-release foot strap that provide added safety in the water. One size only: Fits men sizes 8 – 12 and women sizes 9 – 13. This item qualifies for free shipping.\r\nFeatures:\r\n\r\nFLEXIBLE BLADE:Makes swimming more fun and enjoyable while obtaining a great core and leg workout\r\nSINGLE BLADE DESIGN:Encourages proper kick undulation needed for an efficient dolphin kick\r\nSTABILITY RIDGE:Built for proper flexion and speed; Technique channels control the flex of the fin\r\nRECREATIONAL MONOFIN:Designed for teenagers and adults (US Male 8-12, US Female 9-13, EURO 40-46); Open toe and heel design fits a wide range of foot sizes\r\nQUICK RELEASE:Strap configuration allows feet to be quickly removed from fin for safety\r\n\r\nItem # 1.35.003