I had one of these, and it worked well, was thick, waterproof, etc: https://www.amazon.com/gp/product/B07J1VZBD8

Ideally, you'd use one of these: https://dahanger.co/products/dahanger-dan and mount it in the living room as a showpiece, which I ended up doing with both mine and the gf's bike. Can't recommend these hangars enough, especially because they don't take up any floor space. Gf's bike is on the floor in this one, but you get the idea https://i.imgur.com/73SQntg.jpg