ZAPA This is a very light seamless underwear designed to be used as a base layer.on the body.Polypropylene micro fiber contains the permanent SILTEX finish, silver ions inside the fibers.It provides antibacterial protection and high thermal insulation.Features:Printed care info (no scratchy labels).Composition:90% Polypropylene, 10% Polyamide. Compare prices from: Lasting in Woman's Sportswear