As the description says, it is a "smooth leather belt" - and apparently of good quality. They are significantly heavier than I expected and for this reason are probably more suitable for everyday use than suit trousers. [It's not weak!]
Optimized Classic Leather Ratchet Click Men's Accessories and Belts
50 Review
Experience Lightweight Durability 👍 with Horizon Gunmetal Ultralight Black Strap
54 Review
Nathan Zipster Running Waist Black Men's Accessories
60 Review
Kenneth Cole REACTION Perfect Adjustable Men's Accessories
56 Review