PREMIUM MATERIAL: 75% Combed Cotton+22%Polyester+ 3% Spandex, Combed cotton is a softer version of regular cotton, it requires more work and results in a higher quality, tougher fabric. PRODUCT DIMENSION: One size fits US women size 5~11, our liner socks are stretchy enough to fit most ladies COMFORTABLE??Our no show liner socks are very comfortable to wear. The elastic band has good elasticity and silicone grips won??t dig into your heel and leave red indent.They won??t hurt your skin and take good care of your feet. ANTI SLIP&TRUELY NO SHOW: 5 Silicone Grips to keep socks in place and will not fall off the feet, we can’t guarantee 100% anti slip because everyone has different foot types, but we have done tests on 100 people and only 3 people reported slip, ultra Low Cut design for flats keep 100% invisible. FRIVOLOUS BREATHABLE: Made of quality combed cotton, breathable? ventilation fresh and odor resistant, wear deodorization liner socks and stop worrying about foot odor.