I wear them under another layer with long sleeves, for example under a shirt or sweater. They work a lot better than you think, thin stretchy clothes. I prefer these to the SmartWool t shirts and have 4 of these so I can wear them every day.
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
π Nantersan Placket Raglan Tee - A Casual Must-Have
52 Review
Men'S Regular Fit Short-Sleeve Dress Shirts By Allsense - Look Stylish And Professional!
41 Review