This is not polypropylene as advertised; rather, it is made of 88% polyester and 12% spandex. I believe this is most likely a fake and not a real Aeroskin.
Men'S Long Sleeve Polo Shirt - Slim Fit, Stretchy, Breathable Collar
43 Review
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review
Calvin Klein π Herringbone Sleeve Men's Dress Clothing
50 Review
Van Heusen Traveler Stretch Men's Shirt
47 Review