The Strato Tech Tee is the softest piece of workout apparel on the planet, doubling as Vuori's go-to t-shirt. With next-level comfort, Vuori's softest performance knit is moisture wicking with UPF 30+. FIT & FABRIC Moisture Wicking UPF Rating Quick Drying Soft Performance Knit True to size Model wearing size: M 96% Polyester 4% Elastane Country of Origin: China