this helps smooth out these obstructions and break down adhesions, helping to increase blood-flow within the muscle. By using your own body weight and agility, you roll specific muscle groups against your Professional Series foam roller to mimic a deep, gliding massage. You can control how much pressure you apply to the tissues that you're working on, and you can locate and focus on areas that are problematic. Some muscles (like hip flexors) and ligaments (iliotibial band) are prone to shortening, and are difficult to effectively stretch and apply therapeutic pressure to using standard massage and trigger point therapy techniques. But with a foam roller, you can apply deep pressure massage to such areas and lengthen shortened tissues, thereby preventing physical imbalances that can predispose you to injury. No worry that you can't doing exercise when traveling, light-weight and you can carry it with you to any place. Color:black;blue;pink;green. Overall diameter:140mm Weight:900g Material:EVA+PVC Tips: With your new foam roller you can also promote optimal spinal range of motion. You can accomplish this by slowly rolling your spine against the foam roller, and pausing whenever you feel restrictions to allow your joints and surrounding tissues to stretch. Package Included: One Foam Roller.