This Big Jaguar Energy Long Sleeve T-Shirt is made with 100% US cotton (Athletic Heather is 90% US cotton 10% polyester). This unisex long-sleeve shirt is a highly versatile choice that stays comfy throughout the day. Their tubular shape provides an easy-going, classic fit that is perfect for any occasion while the ribbed cuffs help maintain the garment's good looks for longer. .: 100% US Cotton (fiber content may vary for different colors) .: Medium fabric (6.0 oz/yd² (203 g/m .: Classic fit .