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. Please note. The watch displayed in the pictures is for display purposes only and not included. Premium FKM Rubber Tropical retro divers watch strap with quick release pins.