Answer:
Gases produced during a reaction.
Explanation:
Closed-toes are suitable as protective equipment for laboratory personnel. The closed shoe provides protection to the feet and prevents any substance from promoting a physical danger to the skin of the feet and the health of the professional. These shoes prevent your feet from contacting hot water, broken glass and even acid. However, these shoes do not provide protection against gases, gases can enter permeable closed shoes and cause damage to the professional's feet. For this reason, it is ideal for laboratory workers to wear waterproof closed shoes.
