Very neat graphics and an excellent idea for a shirt however: it is advertised at 100% cotton and it is not. It's color is advertised as ash ( so I expected it to be a solid very light grey) but it arrived an unfashionable heathered light gray. The medium is wide but not long enough for an adult male under 5'9" even with a shorter torso. It shows belly button- which is not the look an engineer/scientist is going for in my opinion. The printing on the back of shirt was crooked by 20 degrees, so was very noticable and also ironic.( A scientific shirt with such bad printing is like a librarian novelty shirt with all the english words spelling incorrectly.) Their claim of "printing may vary", is apparenly not the script, pictures or amount of ink used but instead seems to indicate a lack of quality control when feeding shirts through printing machine. At this price bracket it is very disappointing and all the great return policies in the world mean nothing if you are giving someone this as a gift. A customer needs the proper present, at the proper time, in the proper condition...thats my 2 cents. If executed correctly this would have been such an awesome gift. Now it will just be another flop my husband will sleep in so I won't feel too bad.