Most people barely notice the tiny metal studs on the corners of their jeans’ pockets. At first glance, they seem like simple decorative touches, but these small pieces—called rivets—are actually key to what makes denim so durable.

Rivets trace back to the late 1800s, when jeans were created as rugged workwear, not fashion statements. Miners, railroad workers, and laborers needed pants that could withstand long hours of movement and the weight of heavy tools. Early denim often tore at stress points, especially around pockets and seams.

A tailor named Jacob Davis frequently encountered this problem while repairing worn-out work pants. Rather than relying solely on stitching, he experimented with reinforcing vulnerable areas using small metal fasteners. By strategically placing rivets where the fabric experienced the most strain, he dramatically reduced tearing and extended the life of the pants. Davis eventually partnered with Levi Strauss to patent the design, and riveted jeans quickly became synonymous with toughness and durability.

Rivets work by distributing tension across the fabric, preventing seams from pulling apart. Copper and brass were commonly used because they resist rust and withstand frequent washing. Today, rivets remain a hallmark of jeans, quietly performing the same function even as styles change. Though easy to overlook, they are a testament to the clever design behind one of the world’s most iconic garments.