The 1791 Ultra Custom Belt Holsters Memory-Lok technology allows for a customized fit with Kydex like retention with the comfort of leather. 1791's patent-pending process allows you to customize your holster to your firearm" multiple times" using a simple three step process. The Ultra Custom is designed with a high sweat guard that provides a layer of protection between you and the firearm. Once you receive it" follow the instructions and mold the Memory-Lok Leather to a full custom fit for your firearm. You can't get any more custom than that!