What is required in order for a pfd to be legal?

For a personal flotation device (PFD) to be legal, it must meet specific safety standards set by the relevant regulatory authority, such as the U.S. Coast Guard. It should be appropriately sized for the wearer and in good condition, free from significant wear or damage. Additionally, the PFD must be readily accessible and worn when required by law, depending on the type of watercraft and activity.