CanDo Polyethylene White Foam Rollers are economical, versatile and easy to use. Prevent future muscle injury by using these rollers to enhance your balance, improve core strength, and increase flexibility. These foam cylinders are perfect for positioning, balance, muscle posture re-education, spinal stabilization, and other strengthening and range of motion exercises. They are great to use for physical therapy, yoga, exercising, stretching, or resting. Use round rollers to enhance your workout by making push-ups, planks and other exercises more challenging. After a workout, use round rollers to give yourself a deep tissue massage, slowly rolling over various areas of your body. You break up scar tissue, and speed up workout recovery. Round rollers offer progressive exercise sequences - users can graduate from an easier (smaller diameter) roller to a more difficult (larger diameter) roller.Half round 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. The diameter refers to the width of the half-round profile.The CanDo Polyethylene White Foam Rollers are available in 48", 36", 30", 24", 18" and 12" lengths and 3", 4", 6" or 8" diameters with either a round (circular) or half-round (semi-circular) profile. The 6" diameter version is most popular among users, while the shorter length versions are ideal for homes and small clinics. Its extruded polyethylene 2.0 lb density provides a moderate firmness. The foam is strong enough to be used by large adults and active children. These rollers are perfect for all body types from beginners, to professional athletes. They can be used alone or with other exercisers such as CanDo exercise bands, tubing, weights and balls. Choose the roller that is right for you!