Trigger Point Grid Foam Roller Lenth 13" Diameter 5" IsoSolid Trigger Point Foam Roller features Distrodensity Zones, Matrix Technology and an environmentally friendly design. Being only 13" long and 5" in diameter, the sleek design of this makes it an excellent travel companion. Quantities are extremely limited - order yours today! The Isosolid Trigger Point Foam Roller is designed to withstand constant, heavy, and repeated use without breaking down. It is Built from EVA foam and has matrix & Distrodensity Zones. Its Unique design allows for targeted massages. . Whether you're looking to massage your lats, quads, lower back, or any other large muscle group, or trying to achieve a killer core body workout, The IsoSolid Trigger Point Foam Roller is certain to suit your needs. It is the most versatile and comprehensive foam roller and workout tool available.