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NOW EVEN BETTER-the redesigned fabric provides even more stretch and better recovery. Polartec Power Dry fabric is 96% polyester/4% spandex. Machine wash and dry. The best synthetic moisture-wicking fabric we've found for cool-weather activities. Soft double-plaited interior efficiently pulls dampness away from your body. Pill-resistant exterior quickly disperses moisture so you stay dry. Flatlock seams give you a smooth fit. Imported.