Genuine FKM Rubber watch strap band. You may have seen straps advertised, claiming to be FKM Rubber at a significantly lower price. It is highly likely that they are silicone. To look at, there is not much difference. FKM is more dense and robust. It is firm to feel and more rigid. Silicone is soft and more flexible. There is nothing wrong with silicone straps and we sell many ourselves. If you want to make sure you are ordering genuine FKM then ask the seller the questions. Inspired by the 1960s vintage waffle strap. Premium quality FKM Rubber with quick release pins and stainless steel buckle. Flat ends and will fit any standard lug to lug watch for the correct size ordered. Length 125mm and 75mm. Ideal for smartwatches and analogue. Some smart watches may require an adapt.