Old Navy Cropped Cozy-Knit Cardigan & Cozy Cropped Sweater Tank Top You'll feel like sunshine on a cloudy day in this Old Navy Cropped Cozy-Knit Cardigan ($40) and Cozy Cropped Sweater Tank Top ($30).

This crop tank top is made of the same light, nylon-y material as Under Armour's Iso-Chill Leggings, meant to help "disperse body heat" to cool your skin.