Hatch PM555 Postmaster with Thinsulate Insulation Featuring an inner lining of C100 Thinsulate Insulation, cotton/acrylic blend liners, and soft suede leather. Toughtek non-slip pads are sewn onto the fingertips (except the pinkies) for mail sorting, handling and great grip in all weather conditions. Elasticized, extended cuffs keep out cold weather and ensure a snug, comfortable fit.