Marmot Men's Reactor 1/2 Zip Jacket PolartecClassic 100 100% Polyester Micro Fleece 4.6 oz/yd Imported Bonded Zippered Sleeve Pocket Versatile, warmth-boosting top layer is well-suited to outdoor aerobic activities or simply kicking around the house on weekends Polartec Classic fabrics are renowned for lightweight warmth and breathability; 100% polyester velour construction creates air pockets that trap air and retain body heat Polartec Classic 100 Micro material, flat lock construction, and bonded, zippered sleeve pocket 12-inch center front zip, 27.75-inch center back length, and 9.3-ounce weight Includes limited lifetime manufacturer's warranty