Meet the just-right topper for days that are cool, but not too cold. Made of the element-fighting woven ripstop fabric found in our fan-fave Whirlwind Jacket, it boasts a fabulous new-for-the-season print that will have your fellow runners asking where you got it. Ultra-wind-resistant, you’ll enjoy the breeze in your hair while your core temperature is regulated, no matter how blustery it gets. Roomy enough to throw over a long sleeve shirt at the starting line, it packs right into its own pocket and straps onto your arm when the sun comes out, or when things get sweaty.