Based purely on its advertising, I always go into Uniqlo expecting clothing that makes me look cool and put together in a simple, easy way. Based on experience, I know that is not always the case. Sometimes a loose, linen shirt designed by Inès de la Fressange is better left to Ines de la Fressange — or people shaped exactly like her.

But sometimes, the dream is real. I found it with this navy crew neck sweater, which is slim but not skintight through the arms and isn't excessively long — optimal for high-waisted jeans. (The waistband is the best part! Don't cover it up!) Put another way, it's the perfect building block for an understated, unimpeachable look. Sling a black leather bag over your shoulder, put on some great flats or sneakers and go, go, go.

Uniqlo cotton cashmere crew neck sweater, $19.90, available at Uniqlo.

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