You know a lot about boats or maybe you just know a lot about a lot of things. Either way, you want people to know that you own a boat and you may or may not know things. Wear this shirt and see what you really know! There is a test at the end of the season so at least try to find out some things while you are out there. The front on the shirt has our company logo and the back has the graphic and text. Long Sleeve Shirt. Easy to fit in, very comfortable, and will keep you both warm and stylish during the colder months of the year. 6.1 oz 100% preshrunk cotton. Sport Grey is 90% cotton, 10% polyester. Double-needle stitching, taped neck, and shoulders. Quarter-turned to eliminate center crease. Ultra tight knit surface.