This is a Polo Ralph Lauren half-zip pullover blouson! The color is navy! It's a beautiful item with no scratches, stains, or signs of wear! Both the outer and inner fabrics are polyester, but the outer fabric has a smooth and supple feel, while the inner lining has mesh in the body and satin in the sleeves. It's exactly what you'd expect from Ralph Lauren. It even has action pleats on the shoulders. As a side note, the inside of the Velcro cuffs has the "RL" logo, which I think is interesting, as it has a Ralph Lauren Sport or Golf-like design. I imagine it's an item from a transitional period. The size is M, but it has a wide body. I've included the actual measurements at the end of the images, so please refer to them. Also, please allow for some slight margin of error. Please consider it if you're interested!