When I gave up my last big combo amps and opted for the one-channel wonder Pro Junior IV, I tried to order a cover from D2F ("designed to fit"), who made snug covers out of durable and slightly padded material. Sadly, the boss had died, and no one carried on. As usual, I was able to find something suitable from Thomann at a reasonable price. But it really isn't what I was hoping for. The fit of the Fender-brand cover is loose, and the material is very thin. It offers good protection against dust and maybe humidity, but nothing more.