Hi, what does the Class 1 Flight Physical for the USMC consists of?
There is no "class 1" flight physical in the USMC. There's a long form and a short form. You get long forms upon getting into naval aviation and on birthdays divisible by 5(as in 25YO, 30YO, etc., not just because you were born May 5). All other years you get a short form.
On long forms, you get the full Monty, full op-check on all systems. Short forms are pretty quick--eye tests, audiograms, bloodwork, vitals, and a consult with a doctor.
FedDoc could give you all the particulars. Any particular exams you're concerned about?