2" wide 3M Scotchlite reflective striping for torso and upper body. Cuffs and waistband are elastic for good fit and to keep out cold. Made of Whisk-Itâ„¢ treated 100% polyester, specially engineered to open up sealed fibers and create a moisture transport channel which continuously moves perspiration and away from body. Sweatshirt lining is warm and cozy fleece.