Updated with new design lines, the Park T-Shirt is a technical t-shirt with an every day style, possibly the most versatile t-shirt you'll ever own. Concept/Technology: UPF50 / AdvancedSkin ActiveDry. Fabrics: Stretch jersey heather. Fit: Active fit. V neck. 1 back pocket. Composition: Body: Polyester 88%, Elastane 12%.