If possible, the bellicon should not be stored outside or in the blazing sun for a long period of time, but should only be left outside for the duration of the training. The frame of the bellicon Classic is painted black with a protective coating, so is splash-proof, but not weatherproof.
As with a bicycle, permanent moisture can lead to rust on unpainted parts of the frame over time. We therefore recommend that you store your bellicon in a dry place after training in the fresh air.
The stainless steel frame would theoretically be rust-resistant. However, the mat and bungee rings wear out much quicker due to bad weather conditions. This would not be covered by the warranty.
You can find more information about the quality of the bellicon here: