4.9 oz./yd², 89/11 recycled polyester/spandex Heather colors are 45/44/11 recycled polyester/polyester/spandex Moisture-management properties Self-fabric collar with collar stay that helps maintain its shape Mesh collar stand Box-stitched two-button placket Set-in sleeves with rolled forward shoulder seam Side vents Tagless label This product meets the following Sustainable Style subcategory - Sustainable Materials - Contains 89% recycled polyester