Rain boots  are a must-have for any season, and the best ones combine fashion and functionality, shielding your feet from puddles, water, rain, and slush—that is, sans any bulkiness (which is key when traveling and preserving precious suitcase space!). Classic rubber rain boots are great for casual everyday wear, while those made with waterproof leather are slightly more formal—and are stylish enough to be worn on dry days, too. Most options feature thick rubber soles for grip and traction to help prevent you from slipping in the rain.