My son wears them as a tank top and he likes a slimmer fit than a regular tank top so it's smooth under other shirts. He says they're lightweight and cooler to wear. The sizing seems correct to fit exactly as shown in the picture. He wears 2X and is 6ft 4in tall, about 250lbs.
Men'S Long Sleeve Polo Shirt - Slim Fit, Stretchy, Breathable Collar
43 Review
Men'S Regular Fit Short-Sleeve Dress Shirts By Allsense - Look Stylish And Professional!
41 Review
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review
INFLATION Bamboo Shirts Sleeve Elastic Men's Clothing in Shirts
45 Review