Modern soft-top convertibles are pretty resilient to bad weather. Just keep it clean (a jet wash will do it) and wipe off any snow. Resist the temptation to drop it in cold weather, too - this is what'll cause cracks. You can get a maintenance kit if you're really worried, too. There's a couple of options we'd recommend. The first is Autoglym's two-part maintenance kit to clean and preserve it: amzn.to/2DQCdgI.

You could also try Gtechniq's W2 Multi-Purpose Cleaner and Smart Fabric V2: amzn.to/2OtojJ6 and amzn.to/2Y7JqoS.