Outsole leaves no marks: Non-marking outsole Enhanced grip and fit: Textured footbed Water management: Drainage holes for water expulsion Slip prevention: Slip Resistant Outsole Secure foot placement: Molded shoe design with heel detail Free shipping offer: Enjoy free ground shipping on orders $75+ The all new Xtratuf Riptide is a one-piece injection . BioLite slip-on sneaker. Built for life on and off the boat, the Riptide is non-marking and slip resisting. With drainage holes throughout the upper, this shoe is made for all day wear wherever you go. The Riptide is available in adult sizing (Men's 9 = Women's 11).