Hot Chillys Women's Micro-Elite Sub Print Zip-T Base Layer Top A blend of 90% MTF micro polyester, Bio-Silver antimicrobial polyester and 10% spandex, which is lightly sanded for comfort and performance. Drop tail Stylish prints are sublimated to retain vibrant color, fabric breathability and original feel Flat seam construction to reduce bulk & abrasion Made is USA, China & Vietnam