Everlane understands that, which is why this midweight long-sleeve T-shirt in a slim fit is part of their “Uniform” collection—and adding it to your own wardrobe is bound to do wonders.

The shirt: Cos Slim Lightweight Long Sleeve Top ($49) The details: Sizes XS-L / 94% cotton, 6% elastane / Also available in black, gray, olive green, and more My review: It’s in the name: This ...