It is 100% real. Here is the official website https://satan.shoes/product/.

Make no mistake, this is a deliberate attempt to normalize Satanism. They made the vaccine popular-- and that is something that has the potential to KILL us. Just imagine how they will market other objects and fads that will be designed to make the masses covet Satanic possessions. We need to fight evil in all of its forms. We need to protest, share, and shine light on their evil agendas!