Sometimes Carve Designs really nails it with regard to fit and functionality, and on the Belles Beach rash guard they did just that. Cap sleeves show off your biceps while still providing full back and shoulder coverage (thank you!), raglan seams allow full-range shoulder movement (again, thank you), and the neck is crew enough for skin protection but not chokingly tight. The screen print is crap, though. Mine cracked after the first wash. Maybe it will peel off entirely (wishful thinking). For reference, I'm 5'6" 125lb and Small fits perfectly.