CanDo Full-Skin Extruded Half-Round Foam Rollers are economical, versatile and easy to use. These half round rollers feature a textured surface or 'skin' on both the round and flat surface. This provides protection and stability to the roller, preventing it from warping or bowing in the future.Prevent future muscle injury by using these rollers to enhance your balance, improve core strength, and increase flexibility. Half round foam rollers are a great tool for ankle stretching and knee rehabilitation. You can also use them as a rocker board by standing on its flat side to improve your balance.