Sigvaris fans all have at least one pair of Select Comfort, because they are so comfortable. The knit construction makes the fabric very stretchable and forgiving, which makes this sock easy to don and easy to wear. Double-covered spandex yarns add to their comfort and durability. This is an excellent choice for people with arthritis, or limited range of motion. Made from 69% nylon and 31% spandex in USA.