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Now even better - a redesigned fabric offers more stretch and better recovery - for the best synthetic moisture-wicking fabric we've found for cool-weather activities. Antimicrobial Polartec Power Dry 96% polyester/4% spandex. Machine wash and dry. Soft double-plated interior efficiently pulls dampness away from your body. Pill-resistant exterior quickly disperses moisture so you stay dry. Lightweight fabric is ideal for moderate cold or more vigorous aerobic activities. Flatlock seams give you a smooth fit. Thumb loops keep sleeves down. Imported.