Run, jump, lift, stretch, repeat. The ultralight and breathable Performance Long-T is fit for all the ways you get sweaty. Materials 100% Polyester No one wants to feel hard points or distracting seams. So we made taped seams tactically positioned to remove irritation and chafe. That way, you'll keep your body in the comfort zone – even when your workout isn't. It keeps you warm in the cold, and cool when it's hot – this blend of Japanese knit fabrics is pretty incredible. Fast-drying and incredibly lightweight, it works to wick moisture away from your skin, while the antimicrobial treatment in the yarn locks in freshness and keeps odors away.