The Fitted T-shirt
Credit: Photograph by Greg Broom

Designers are making T-shirts from ultra-high-quality cotton with a trim fit that can work with a sport coat. Whether you spend $15 for a tee from online retailer Everlane or $115 for one from Swedish label Acne, a good collection of T-shirts (that don't come in a pack of three) is a modern necessity. [A.P.C. T-Shirt, $95; uscheckout.apc.fr]