I will keep this short and sweet:  I am never buying Hanes anything again, especially these "Lay Flat Collar" t-shirts.

The the collar "lays flat" for the first the first few weeks, unless of course any moisture at all gets on them.  The first hint of humidity, perspiration or precipitation will render the collar impotent and flaccid-- the collar will lose elasticity and roll backwards towards your neck.  Keep this in mind if you live in warmer areas or climates, or happen to sweat a little more than most.

Also, the material is cheap and thins out and stiffens rapidly over time.  If you wear one of these t-shirts once a week-- obviously washing in between wears-- it will break down in in a couple months.  That's about eight wears before it hits the trash.

Skip this cheap "lay flat" marketing ploy and go with Calvin Klein or a higher-end brand.  It's worth the extra $$$.