Our C-FREE ® carbon neutral polos not only feel good, they do good. With C-FREE, we measured the carbon footprint of these styles and we're neutralizing their impact with Carbonfree ® certification. 4.9-ounce, 100% recycled polyester jersey Snag-proof Moisture-wicking Self-fabric collar Grey buttons include 31% recycled content Dyed-to-match white buttons on White include 31% recycled content Side vents 5-button placket Rounded hem Due to the nature of polyester performance fabrics, special care must be taken throughout the printing process.