Masks are strictly enforced at Universal Studios for anyone over the age of 3. The only exceptions are on water rides, while you're eating and drinking, or due to a specific medical issue. Definitely choose a comfortable, breathable mask that will allow wearability all day and keep you cool and ventilated. Florida summers are no joke and best thing is to avoid getting even hotter than usual at all costs. Team members constantly remind guests to keep their masks on over both nose and mouth, and even if it can be difficult to do so with the heat or other situations, everyone at the park seemed to be following the rules and was just happy to be there.