Body-Solid Nylon Head Harness Recommended for all athletes and specifically designed for those in contact sports, head harnesses condition the neck and upper back muscles. Features... Recommended for all athletes and specifically designed for those in contact sports, head harnesses condition the neck and upper back muscles. Features include the finest quality materials, extra-heavy D rings and steel chain. Completely padded with high density neoprene to absorb shock and prevent cuts, chafing and abrasion. Use them with free weights or hook them to a high or low pulley on a machine. Weight plates optional.