We have taken every step to make sure your Fastback strap stays with you as long as possible. SYE selects natural leather for a unique and uncomparable soft touch. Like for all leather products, following some simple daily rules will let you enjoy your strap for as long as possible: - do not take baths, showers or go swimming with your Fastback strap - do not spray anything on the strap, particularly creams or perfumes - remove your strap before doing any kind of work... prevention is better than cure. As a reminder, leather is a living and unique material. Therefore, straps will naturally vary in appearance between each other and may also change appearance over time. This is part of their value – every strap will acquire its own patina over time, becoming uniquely yours.