Pain checker socks help to stop foot discomfort dead in its tracks! Clinically-tested, safe to use, doctor-recommended slipper socks utilize bio-electric carbon technology to conduct natural electrical energy from your body to block pain signals. The result: fast relief for aching feet, ankles and toes. Ideal for sleep and relaxation. Machine washable acrylic/lycra/carbon blend. Small fits men’s 7-9-1/2; women’s 8-10-1/2; large fits men’s 10-12-1/2; women’s 11-13-1/2. Pair.  Made in USA.