Marmot Men's Windridge With Graphic Long Sleeve Tee 100% Polyester Jersey 4 oz/yd - 100% Polyester Mesh 3.0 oz/yd Imported Contrast Flat- Locked Seams for Added Comfort Soft, Breathable, Lightweight Performance Knit Fabric Ultraviolet Protection Factor (UPF) 50 Quick-Drying and Wicking Mesh Panels for Breathability