Question

the upf is a numerical rating given to clothing to indicate how effectively the fabric blocks ultraviolet (uv) radiation. what does upf stand for?

• ultraviolet proof factor
• uber protection factor
• ultraviolet protection factor)
• ultra protection factor

Explanation:

UPF is a standard rating for clothing's UV-blocking ability. The correct expansion aligns with its purpose of indicating ultraviolet protection.

Answer:

ultraviolet protection factor