What protective measure is important for clients during chemical services?

Using a chemical-resistant cape is critical during chemical services to protect the client's clothing and skin from potential chemical spills or drips. Chemical services often involve harsh substances, such as hair dye or relaxers, which can cause irritation or damage if they come into contact with the skin or clothing. A chemical-resistant cape acts as a barrier, ensuring that these substances do not cause any harm, allowing the client to feel comfortable and safe during the procedure.

The other options do not provide the same level of protection. While providing a neck strip can help with cleanliness and comfort, it does not guard against chemical exposure. Offering a complimentary head massage, while a nice touch, does not relate to safety during chemical applications. Providing extra towels can be helpful for cleanup but does not prevent chemical irritation or damage. Thus, using a chemical-resistant cape is the most effective protective measure in this context.