Is it the original RPG? One of the best. Share the fun and look good doing it! 
 
These shirts from Bella + Canvas are super soft with a relaxed comfortable unisex fit. These are not a boxy tee. Order the size you normally do and you'll be fine...if you're really worried order the size up.
 
Features
4.2 oz., 100% airlume combed and ringspun cotton, 32 singles
Ash is 99% airlume combed and ringspun cotton, 1% polyester
For heather colors please see style 3001CVC
Retail fit
Unisex sizing
Shoulder taping
Side-seamed
Tear away label
Pre-shrunk