Marathon's vulcanized rubber strap is stylish, easy to install and very comfortable to wear. This high quality strap is waterproof and looks great with both dressed up and casual attire. It features a textured back for grip and a 316L stainless steel signed buckle. Unique pre-drilled holes allow the wearer to select a hole of their choice, thereby maintaining a sleek and smooth strap when worn. This strap includes installed 18mm stainless steel spring bars. Made in Italy.NOTE: The rubber strap includes a shoulderless spring bar that is compatible with watches that have drilled lugs from the outside. If your watch does not have drilled through lugs, then replace the spring bars in the strap ends with shouldered spring bars, so they can be easily removed from lugs that are not drilled through.