Tesla Rashguard Long Sleeve Mock Neck Boys Swim Shirt, Size 12 / Medium. Protect young skin from the sun's rays. Made of 88% polyester and 12% polyurethane. The color is a dark charcoal gray. The shirt does have a few pulls in the fabric and some stains, the worst are shown in the last two pictures. There is still plenty of life left in this very comfy swim shirt.