the number in the style name indicates denier or density of the nylon.; Keep it comfortable and still look chic with the Holly Leggings from Wolford.Opaque leggings that provide a smooth silhouette around the butt and thighs.Elastic waist.69% viscose, 25% nylon, 6% elastane.Machine wash cold, hang dry.Imported. Measurements:Waist Measurement: 26 inOutseam: 38 inInseam: 30 inFront Rise: 10 inBack Rise: 13 inLeg Opening: 9 inProduct measurements were taken using size SM. measurements may vary by size.If you're not fully satisfied with your purchase, you are welcome to return any unworn and unwashed items with tags intact and original packaging included.