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: AdvancedSkin ActiveDry / UPF50 . Fabrics: Stretch Jersey Heather. Fit: Active fit. Crew neck. 1 back pocket. Composition: BODY: PES 88%, EL 12%.