Compression is negligible. I ordered a large one, but received medium ones, and even without compression. I ordered these in place of my regular Under Armor and ended up ordering the UA anyway as they didn't really work.
H2H Mens Casual Slim Fit Short Sleeve T-Shirts Cotton Blended Soft Lightweight V-Neck/Crew-Neck
46 Review
Men'S Long Sleeve Polo Shirt - Slim Fit, Stretchy, Breathable Collar
43 Review
Gildan Performance Men's π Clothing and Shirts with Moisture-Wicking Polyester
44 Review
Van Heusen Traveler Stretch Men's Shirt
47 Review