BVOH and PVA are special water-soluble materials used mainly for printing supports. The model itself is printed from standard materials, like PLA, and the BVOH or PVA supports are then easily dissolved and washed off after printing. These materials need to be stored in a drybox and printed with a multi-material upgrade (or dual nozzle/extruder). It’s a technology more suitable for advanced users.
Read more about BVOH/PVA in our article or compare it with other materials in the Filament Guide.