To keep all its shine over time, a pair of shoes needs to be delicately pampered. Our care products made in France have been developed to keep the natural properties of leather as long as possible. The waterproofing spray remains the masterpiece of regular care because it limits the risk of stains or moisture penetration. You can apply it before the first use on your new pair, then every month or more often if you wear your KOST daily. To do things to the end, you will have to remember to regularly clean the upper part of your shoes carefully with anti-ageing milk, then wax the leather with neutral wax polish. The natural brush provided in the care kit can complete this step by polishing the leather and removing excess cream. This thorough care can be concluded by a new waterproofing of your shoes, which will now be as new again. Be careful, don't forget that our milks and wax creams are only applied on smooth leather, which is called "full grain". It is therefore necessary to avoid any application on suede, textile or nubuck parts. Only the waterproofing can be used on all materials. You can read our Leather Care Guide again on our blog. Finally, find here our cotton or leather laces that will fit on your derby shoes or boots from 3 to 5 eyelets.