The Corefx Wobble Board Features A Textured Non-Slip Grippy Surface, Great For A Variety Of Foot Hand Or Sitting Positions. High-Center Eva/Tpa Soft 12 Cm Foam Base, Allowing For A Floating Balance In All Directions. Helps To Improve Core Strength, Functionality, Sense Of Balance, Posture And Tones Core And Leg Muscles.