us.e the 168 needles machine and withe cotton add the PU material lightest and thinnest sock. Using a Coolmax lining they are ideal for use with lighter weight footwear or by cyclists using SPD footwear.Ankle lengthWaterproof, breathable Porelle membraneClose fittingCoolmax lining for maximum wicking Colour - BlackSizes - S,M,L,XLSock SizesSmall UK 3-5Medium UK 6-8Large UK 9-11XL UK 12-14 .