From the Manufacturer The Guardian Fall Protection "Sport Tux" incorporates tux design by combining a harness within a vest. With its three-layer soft shell comfort technology, the outer shell is highly breathable fabric that provides protection from water and wind. This product provides a four-way fabric stretch which promotes greater flexibility, pockets for functionality, and comes with removable long sleeves. This product is exceptionally ideal for individuals who do not work in a harness all day. Medium size is built specifically for individuals whose height ranges from 5-Foot to 6-Foot 2-Inch and whose weight ranges from 140 to 240 pounds.