The Patagonia Mainstay Tee is the lightest weight classic pocket tee you will ever own. Designed for pretty much anything, it's made from a cool-wearing blend of organic cotton and polyester slub-knit jersey fabric that breathes and dries quickly. Ultra-Lightweight, Breathable Cotton/Polyester Blend, Classic T-Shirt Silhouette, Left Chest Patch Pocket, Hip Length, Regular Fit, Material: 60% Organic Cotton / 40% Polyester Slub-Knit Jersey, Warranty: Lifetime, Closure Type: Pull Over, Type: T-Shirt, Material: Cotton/Synthetic Blend, Wicking Properties: Yes, Sleeve Type: Short Sleeve, Recommended Use: Casual, Model Year: 2019, Product ID: 513546, Model Number: 52980 WHI S, GTIN: 0889833773448