Final answer:
The correct answer is that capes used for dry styling or dry haircutting services are made of waterproof material, which helps to keep the cape clean and hygienic.
Step-by-step explanation:
The type of cape that is used for dry styling or dry haircutting services is made of waterproof material. This material is specifically used to prevent hair and other salon products from coming into contact with the client's clothing. Capes made of cloth, rubber, or leather would not be practical for this situation, as they can absorb hair and compounds, making them hard to clean and less hygienic. A waterproof cape ensures that cut hair slides off easily and any dry compounds used during styling do not permeate the material, keeping the cape easy to clean and ready for use with multiple clients.