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. High quality two piece vented watch strap made from premium FKM flourine rubber, matching keepers and keeper grip, with brushed stainless steel buckle. The connecting ends are flat as per pictures. Quick release pins to easily fit and remove.
eBay