1- Now these shirts have an irritating hard thick neck label. Costco buyer should have nixed this design flaw!! Prepare to cut off.
2-thick white tape at inside collar seam is different and I guess ok. So far.
3-Lots of loose threads under front left and right button placket. Very poor china quality control !!
4- Front button left and right button and eye plackets are not 3+ 2 sewn tacked down, so white underside shows !! Again , very poor QC by Costco and china.
5- button eyelets are not well sewn !! Lots of loose unbound threads that catch on the button !! Again, very poor Quality Control by china and Costco !!