Longvadon's Vulcan Series takes its name from the Roman god of fire, Vulcan, and the complex process involving careful calibration of heat that produces what is called ?vulcanized rubber?. A material that is hard to surpass in robustness and versatility, this is our most suave and sporty strap yet! The Vulcan Series bands offer greater resistance to whatever life throws your way -- from minor scuffs to moisture, and everything in between. And like any other Longvadon product, they are uncompromisingly engineered to be worn all day. Features Manufactured to OEM-Grade Quality for Your Apple Watch Series 1-9 Vulcan Series is precision engineered to guarantee perfect fit to any Series 1-9 (SE Ultra 1-2) Apple Watch. You have the option to choose between two different finishes (Silver and Black) that will fit the 42/44/45mm watch cases. The bands attach to your Apple Watch through purposely designed, built-in rubber that guarantee a secure installation. All-Day Wearability The finishing and malleability is the Achilles heel of most rubber watch bands that struggle to deliver on quality. Thanks to Vulcan Series? luxuriously smooth finish, the band will not chafe against your skin as you go about your day. It also has just the perfect amount of suppleness to follow the contours of your wrist so as not to jut out like a rigid bracelet. The result is a band that can be worn all day, every day, and last a long time. Superior. On An Atomic Level. Vulcan Series bands are engineered from NBR rubber which offers enhanced resistance to oil, sweat, water, tearing, and abrasion. These superior qualities stand in stark contrast to the drawbacks of generic silicone bands that can develop tears over time. Cheap silicon bands also tend to attract dust and lint while offering little to no resistance to everyday contaminants. Imagined Designed in France Longvadon?s French heritage manifests in our products at every level. It can be felt in the finely crafted details, appreciated in the timeless design, or admired in the gratifying proportions. We are proud to be one of the first luxury design houses to bring high-fashion to wearable tech. The Butterfly Clasp ? A flawless compromise between elegance and comfort Invented in 1910 by Louis Cartier, the butterfly clasp folds beautifully to provide a comfortable fit. Stylish and elegant while extremely secure thanks to a double-push button mechanism, it's no wonder it's the hallmark of a true luxury watch band. Specifications Strap Color: Snow White Material: Vulcanized Rubber Buckle Style: Butterfly (Deployant) Clasp Buckle Color: Silver M Size Wrist Circumference: 6.3" (160mm) - 7.9" (200mm) Easily Interchangeable: Yes Compatible With: Series 1 - 9, Ultra 1 2 (42/44/45/49mm cases)