WAHL clippers are made from high-quality materials designed to withstand years of usage. Some models, like the 8355 Professional Designer Clipper, are also water-resistant and can be used for trimming not just dry but wet hair as well, without causing any damage to the blades. However, it should be noted that WAHL clippers are not waterproof, and they should be cleaned properly and dried before packing them up after use.
You can also wash the clippers after use, but it is important to read the instructions and follow them. Corded clippers can be dangerous if they get too wet, so you need to be careful. Exposure to excessive water can damage even water-resistant clippers.