Mens Naked Leather Motorcycle Vest w/ Buffalo Nickel SNAPs. This Motorcycle leather Vest's, a Favorite in Black, Plain or Braided (Naked Leather) Runs Small, please add 2 inches to your chest measurement. The formula for a mans jacket or vest is: Chest size + 2 inches = your size. For example, if a person's chest size is 44 (or 43), according to the formula he should order size 46. Sizes up to 60