Thanks to our ultra-fine flat back RacerMesh, this polo has unparalleled breathability for superior cooling. PosiCharge technology locks in color and keeps logos crisp-making this value-priced essential a fan favorite all season long. 3.8-ounce, 100% polyester flat back mesh with PosiCharge technology Tag-free label Moisture-wicking Flat knit collar Taped neck 3-button placket with dyed-to-match buttons Set-in, open hem sleeves Care Instructions Machine wash cold with like colors, only no-chlorine bleach when needed, tumble dry low, do not use softener, remove promptly, cool iron if needed, do not dry clean. How To Measure Chest Width Measure under the arm and around the fullest part of the chest with arms down, keeping tape horizontal. Size Chart XS S M L XL Size 4 6/8 10/12 14/16 18/20 Chest 25-26 26-28 28-30 30-32 32-35