I generally like the belt. The strap thickness is 0.1 inch / 2.5 mm. The only criticism is the quality of the buckle. The thickness of the steel used is .034 inches and appears to be from the manufacturer. Stamped brass plated stock made from sheet metal stock which is then bent/formed as the edges are unplated. I suspect they must be painted to protect the steel from rusting. In this case you cannot polish the brass. I don't think steel is stainless because it's magnetic. The manufacturer claims "Made in the USA" from "world-sourced materials". I have no doubt that the belt was assembled in the USA, but I seriously doubt that the manufacturing of the belt parts is done in the USA. What do you say Thomas Bates? Show us pictures of your US factory. Edited: After owning and wearing this belt, the surface of the small brass end guard deteriorated and came loose exposing silver-colored metal. As mentioned in my previous review, the brass finish is suspect.