The Columbia PFG Omni-Shade shirt is a medium-sized men's button-up shirt that offers excellent sun protection. Made by the brand M & M, this shirt is designed for outdoor activities and features a stylish design suitable for casual wear. With its Omni-Shade technology, this shirt provides UPF 50 sun protection, making it a practical and stylish choice for men looking to stay comfortable and protected during their outdoor adventures.no known flaws as is new no returns or refunds thank u