FKM rubber, or fluoroelastomer, is a special type of rubber renowned for its toughness and comfort. It's chosen for luxury watch straps because it provides a great feel on your wrist, lasts longer than other materials, and is less likely to cause skin irritation. At Ptahcron, we take pride in using only the highest quality FKM materials in our watch straps. Our straps are meticulously crafted to meet the demands of discerning watch enthusiasts, ensuring both functionality and style. Despite the higher production costs of FKM rubber, our commitment to this premium material demonstrates our dedication to delivering top-tier products that stand the test of time. Because we use some of the finest FKM rubber materials available, our confidence in our products allows us to offer a lifetime warranty.