The Neese Magnum 45 series is a medium weight yet heavy-duty nylon fabric coated with strong and flexible neoprene to provide maximum cold weather flexibility with a high resistance to abrasion. All stitching, except garment hems, are double needle stitched. All seams in the garment, except the hems, are to be sealed on the coated side of the fabric with a clear 7/8” wide PVC tape making the garment 100% waterproof. The Magnum 45 Hood is tested to ASTM D6413 and ASTM F90.