Refrigiwear Men's Lightweight Insulated Econo-Tuff Vest, Navy Keep your core warm - the most important part of you body for creating overall warmth - with 6 ounces of polyester fiberfill insulation Durable 200 denier polyester outershell helps keep out the elements plus avoid rips and snags Features 2 convenient outside insulated pockets to help warm your hands An insulated knit collar adds warmth for the back of your neck A great lightweight vest for those working or playing in cool conditions, especially when you need mobility and don't want to be weighed down by a bulky jacket