??P COOLMAX is a special polyester fiber from the INVISTA company. The special moisture channel of the fiber can help to evaporate more quickly in the circulation condition.The stretch yarns are mixed with LYCRA, it is more fitted and stretch much better.Engineered to keep you cool, dry and comfortable by moving moisture away from the body, Our COOLMAX technology is used in sock. ??P There are anti-skid silicone stripes in the socks and inside, which further guarantee the wearing stability through friction resistance. ??P Hand made always for hosiery tip seam to keep it flat and no bump. ??P No show length for an invisible wear in shoe. ??P Material: Instep Part 35% Cotton, 34.2% Polyester(COOLMAX), 26.6% Nylon,4.2% Spandex(LYCRA) , Decoration part not be included. ??P US Womens Shoe size: 4-8.5 , Heel to toe(in CM): 21-25.5 ??P 5 pack in one, card board package.