On a walk in New York yesterday, Holmes managed to look breezy even in the sluggish humidity.

She wore an oversized button-up with mustard yellow and white stripes, buttoned only at the top.

The open shirt revealed a pair of high-waisted blue jean shorts.

New York NY  EXCLUSIVE  Katie Holmes is spotted taking a leisurely walk in NYC after picking up a few groceries at Whole…

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(The ultimate accessory, however?

Her Whole Foods bag.)

In this sweltering summer, getting dressed to beat the heat is an uphill battle.