Hot Chillys Women's Micro-Elite Chamois Embossed Zip-Tee 89% Polyester/ 11% Spandex Made in the USA and Imported A blend of MTF (Moisture Transfer Fiber) micro polyester, Bio-Silver antimicrobial polyester and spandex for the ultimate functionality Sleek, performance -friendly rubber tip zipper Zip-through collar construction for ultimate warmth Embossed fracture print adds style and retains original fabric properties Flat seam construction to reduce bulk and abrasion