7.7-ounce, 89% recycled polyester/11% spandex interlock knit (solids). 7.7-ounce, 81% recycled polyester/8% polyester/11% spandex interlock knit (heathers). This product's carbon footprint has been measured and reduced through a combination of preferred materials and investing in carbon offset projects through the ClimeCo Certified Product Program. Snag-resistant. Moisture-wicking. UPF rating of 50+. Self-piped zipper placket. Shoulder piecing detail. Dyed-to-match, recycled, reverse coil zipper with silicone-tipped drawcord pull. Self-turned cuffs. Straight drop tail hem. Side vents. Tag-free label K880