Lorals for Protection should only be worn during oral sex. Wearing them for longer periods of time could damage the material and make them ineffective for use as STI protection.
Lorals for Pleasure, however, can be worn for longer periods of time under loose or light clothing (or on their own!), to add to the anticipation or teasing. Just keep in mind that they are made of latex, so they are not breathable like regular underwear. That said, a lot of people love to wear latex fashion, knowing that it’s not breathable. It just depends on your comfort.