Do not tighten by 1980 1950s UK by HJ Hall developed ankle 3 band system is due to the special knitting elastic stay on it, but also after your a non-marking foot friendly comfortable socks. Top elastic ribbed section that keeps the sock or fold to prevent bending, the middle is flexible to the motion of your foot, and foot securely on the bottom part of the sock. Due to this construction does not and make a great sense of restraint where there is no sense of pressure.