3.8-ounce, 100% recycled polyester pique This product's carbon footprint has been measured and reduced through a combination of preferred materials and investing in carbon offset projects though the ClimeCo Certified Product Program. Recycled thread. Marled tonal buttons include 25% recycled content. Snag-resistant. Moisture-wicking. UPF rating of 50. Tag-free. Flat knit collar. 3-button placket. Side vents. Import. Classic fit. Embroidery and Sew on trim. Smoke Gray.