De-Icer™ High Bib Overalls De-Icer™ High Bib Ovealls feature 3M Thinsulate® LiteLoft™ Insulation to provide warmth without extra weight. Roomy pockets offer conveninet, secure storage spaces for papers, keys and other valuable. Black 430 denier nylon, heavy-duty zippers, reinforced knees and take-up snaps at the ankles accent the durable overalls, which also feature a high back with "H" harness suspenders to keep them comfortably in place.