A PRC favorite! (The ones in the plain white box.) BioSoft Orthotics are designed to enhance comfort and alleviate common foot problems such as heel-pain, arch pain, and discomfort at the ball of the foot. Full length cushioning foam cover forms to the unique contours of your foot for maximum relief of pressure points and maximum comfort. Polyester mesh lining provides a soft, friction free surface that wicks away perspiration.