686 Smarty Shift Jacket (3 IN 1) - Men's: Smarty is the Original Trademarked 3-In-1 detachable system! The Smarty Collection is 686’s most popular, versatile, and established line, setting the new standard for the outerwear industry. Smarty offers three levels of performance – 20K, 15K, and 10K, each of which feature the world-renowned SMARTY technology easy zip-in/zip-out detachable lining system. With 686's Smarty Shift Jacket, you have the option to wear the liner for extra insulation and warmth on the hill or without the liner on a sunny spring day.