Fits Perfectly On The Concept 2 Rowing Machine: This black seat cushion is designed to have the exact specifications of the Concept 2 rowing machine's seat in mind - so it's a perfect, snug fit. It also fits on the WaterRower, HydRow, and more. Anti-Slip Technology: The cushion's bottom side is covered with a new, extra strong anti-slip fabric, so it's able to stay in place even during intense workouts. Sports Grade PU Foam Core: The cushion's core consists of polyurethane foam, making it soft enough to provide comfort, but still firm enough to support you during your exercise session. Designed For Frequent Use: Using this rowing machine seat cushion during your workouts will help to prevent pain and discomfort - even after multiple daily rowing exercise sessions. Easy To Clean: All you have to do is wipe it down with a wet cloth and let it dry - simple as that.