Boot cuffs are socks without the lower foot portion. They are worn at the ankle, mid-calf or above the knee, depending on boot height. Boot cuffs close the gap between pants, leggings or bare legs and the top of boots, adding layering and style without the bulk of a full sock.
Boot cuffs come in a wide array of styles and fabrics, plain or fancy, but are meant to be thin so as not to bulk up the overall leg space within the boot. Because boot cuffs or boot toppers do not have the lower foot portion like a sock, they do not require laundering as often as socks.