Complex sentence: The circuit boards are wrapped in neoprene, which is a kind of rubber used in diving suits and capable of withstanding heat, water, and other fluids as well as to provide cushion for the electronic components inside.
Split into simpler sentences: The circuit boards are wrapped in neoprene, which is a kind of rubber used in diving suits. The neoprene is capable of withstanding heat, water, and other fluids and it cushions the electronic components inside.