Disposable plastic blue aprons.

The person is wearing a blue disposable plastic apron, also known as a PE (polyethylene) apron. These aprons are single-use protective garments made from a lightweight, waterproof material that provides a barrier against spills, splashes, and contaminants. 

Key Details:

• Material: Typically made from polyethylene (PE) plastic.
• Use: Widely used in environments where hygiene is crucial, such as food processing and handling, catering, cleaning, medical facilities, and laboratories.
• Function: Designed to protect clothing and skin from liquids, oils, and other substances, and to prevent cross-contamination.
• Features: They are lightweight, generally latex-free, and come with a halter neck and waist ties for a secure fit.