CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER Q—EQUIPMENT, CONSTRUCTION, AND MATERIALS: SPECIFICATIONS AND APPROVAL (parts 159 to 165) > PART 160—LIFESAVING EQUIPMENT > SUBPART 160.055—Life Preservers, Unicellular Plastic Foam, Adult and Child, for Merchant Vessels (§160.055-1 to §160.055-9) > 160.055-4—Materials—nonstandard life preservers.