He'll love this jacket, especially 'cause it comes in sizes for the whole family! Available Sizes: XS (4), S (5/6), M (7/8). In our polyester polar super fleece with nylon Taslon piecing. Sleeve bindings in polyester tricot with a touch of spandex for easy stretch and stay-put style. Zip-front style has an easy-pull tab; close it all the way for a toasty stand-up collar.