Product information: 

Material: Each chain link is made of carbon fiber, which is both durable and fashionable. Carbon fiber is waterproof and can be cleaned with water. It is not recommended to wear a wristband while swimming in saltwater.
Feature: This smooth textured carbon fiber chain weighs only 1.1 ounces, and the classic style provides all-day comfort.
Watch strap size: length: 7.3 inches x width: 0.87 inches x thickness: 0.16 inches