The Tommy Bahama 'On the Flip Side' Shirt ($100) is a great addition to your wintertime wardrobe. Available in four different colors, each one reverses to a versatile dark heather grey, and is made from super-soft cotton. The half-zip mock neck lets you rock a button-down underneath, and the slightly-banded cuffs and hem hug your wrists and waist with just the right amount of force.