MAGCOMSENMen's Polo Shirt Quick Dry Performance Short Sleeve Tactical Shirts Pique Jersey Golf Shirt

What makes a shirt "tactical"?

I’m 6’2” and 180 lbs and I like a slim fit can I fit in a medium?

Does the collar curl after being washed, or does it stay nice and flat?

62 year old stroke survivor 5' 10 about 240 lbs what size 2x I don't like binding but don't want crazy loose, also does it hold its shape in the shou?