100% Nylon. Stretch Fabric. Swing Tech™. Knit Stretch. Panel Detailing. Primaloft 100 Gsm Fill Inside Quilting. Quilted Lines. Front Zip Pockets. Chev Logo Back Neck. Machine Wash. Swing Tech™. Made to maximize your range of motion on every swing, Swing Tech provides noticeably less restriction through re-engineered construction and materials.