This shirt is very well made, zips up the side! You don't see a side zipper very often - helps fit the shirt nicely. Runs small in my opinion - ordered size up. SO many compliments when I wore it out to dinner. The glow in the dark is super fun and surprises others when going into a dark area or bathroom with backlight - a lot of that during Halloween festivities. Not disappointed at all - very excited about this shirt!