Nylon with polyester fill.  2 pockets on the outside.  1 pocket on the inside wit hook/loop closures.  Zips and snaps.  Elastic bottom and cuffs.  Classic 80's drop/batwing sleeves.  The size Y. men XL probably means young men's which is a little more fitted than regular men's.  I haven't seen one like this one! From a smoke free home with your satisfaction guaranteed.  Approx. measurements