Thicker, heavier cotton, but it's still soft and comfy. Double stitching on the neckline and sleeves add more durability and the message makes a point. 
 
• 100% ring-spun cotton 
• Sport grey is 90% ring-spun cotton, 10% polyester 
• Dark heather is 65% polyester, 35% cotton 
• 4.5 oz/y² (153 g/m²) 
• Pre-shrunk 
• Shoulder-to-shoulder taping 
• Quarter-turned to avoid crease down the center