Urban Scout Series - Natural Leather Watch BandEvery strap we build is made from durable Italian calfskin with exceptionally fine grain that are vegetable tanned, meaning the leather has been tanned in the old fashioned way using organic tannins from tree bark. Vegetable tanned leather matures without ruining and it is non sensitive. Because our leather is made of natural materials and tannings, your strap will develop a beautiful patina and over time will develop in colour with use. 16mm and 20mm