Exervo PE2 Muscle Therapy Foam Roller in 4 Sizes Extruded and precision cut medical grade polyethylene white foam Perfectly round with some give at the surface. Firmness rating: Level 3, Moderately Firm Ideal for IT band, back, quad and calf massage or pilates foam roller exercises Recommended by chiropractors, therapists, trainers and used in sports, fitness & therapy Medical grade foam made in USA.