Thera Band Exercise Mats are high density, lightweight supports used to provide comfort, safety and protection against injury. The professional club quality mats have a fabric-like surface that is waterproof, wear resistant and designed for the repetitive use associated with fitness clubs and rehabilitation professionals. Choose between a mat thickness of .6" or 1" thick, based on your own personal preference. IN general, Yoga practice is best with the .6" thickness, while Pilates is best with the 1" thick Exercise Mat.