Polarmax Men's Comp Tech 4-way Stretch Tight polyester 90% Acclimate Dry Polyester, 10% Spandex Heavy Weight 4-Way Power Stretch Fabric. Flat seam construction for ultimate comfort. Tighter Athletic Fit-not compression. Tech Face/Brushed Fleece Interior/Stretches for mobility/Anti-microbial/ anti-odor protection. NO Shrink-Easy Care Machine Wash and Dry 100% Made in The USA