Select leather is harder than the regular leather; this is achieved by selecting the leather during its preparation (tanning) process. So, there is no need for a customer to add additional Proofide to the leather at all - or at least not for several years. The first use of Proofide could be done after 3-4 years of saddle uses and then afterwards revert back to every 6 months. Moreover, applying Proofide to Select leather can actually be useful to the saddle. Cyclists who do not have mudguards on their bicycle, or who drive frequently through water, do tend to put a one-off application of Proofide (and leave it on) on the underside of leather to act as a water barrier from splashing. This is acceptable to be done on the aged leather too.