Description:Women's cotton bi-knit thermal long johns Feature:thermal,comfort,bi-knit Model No9872MaterialOuter and inner layer:cotton,middle layer:Polyester ... implements international standards and obtained ISO 9001/2000,ISO14001/2004,WRAP,Oeko Tex Standard 100 certifications. Because of good quality reputation ... underwear brands at home and abroad. Women's cotton bi-knit thermal long johns