The Trigger Point Nano Foot Roller is an innovative roller specifically designed to increase flexibility and relieve minor muscular aches and pains. Simply roll your foot forward and back in a seated or standing position to increase your blood flow and ease tension in the sole of your foot. The NANO Core surface helps channel blood directly to the tissue for health and mobility. The primary use of the NANO roller is for your feet, but its versatile enough to be used for forearm release as well. The Original (Orange) is Trigger Points standard density. The X (Black) is a firmer density. The ONLY massage tool designed specifically for the foot that replicates the feeling of a massage therapists finger tips. Relax overworked muscles of the foot and forearm to alleviate minor aches, pains and tension. Forearm release helps minimize the effect of daily repetitive movements. Convenient size is perfect for travel.