A minimalist Optics ready Inside the Waistband Kydex Holster for Heckler & Koch Pistols. Hand Molded Adjustable Cant IWB KYDEX Holsters. These minimalist inside the waistband KYDEX holsters protect your weapon from moisture while remaining extremely lightweight and durable. They are the perfect all around holster for every day concealed carry of your firearm. These holsters are comfortable enough for everyday use and very easy to hide no matter how you are dressed.