When constructing most of Sidi boots, Sidi uses a new generation material called “Technomicro”.Technomicro is a composite microfiber material created from strands that are so fine, each one is less than one thousand the thickness of silk.Technomicro is a water resistand and it is very easy to clean or maintain, Technomicro won't stain and will offer more flexibility and a way better feel than other synthetic boots materials.The boots have a replaceable chin plate and slider it also has replaceable ST10 buckles and ST10 straps.The ST boots offers a side and slider ventilation system.