THIS IS AN AMAZING PRODUCT BY CARHARTT! It is lightweight 4 ounce 100% polyester. The Force Burnett Multi Gaiter has Charhartt's amazing FastDry® technology wicks away sweat for comfort so you can stay focused on your day. Fights odors: traps and releases them in the washing machine! There are 8 WAYS TO WEAR IT!! It also is made with 2-way stretch so it will be snug when you need it to be and still stretch when you want it to.