These colorful knit hats with earflaps, known as ch’ullos (CHEW-yohs), are worn by men in traditional Andean villages. You don’t usually find many high-quality ch’ullos in Lima, but this past Monday I found a virtual forest of them on the third floor of Saga Falabella department store, in Jockey Plaza, where the hats are being featured in a high-end artisanía exhibit, “Perú Hecho a Mano.” (Check out my story on the “Hecho a Mano” exhibit in this week’s Living in Peru.) You can find cheap mass-produced ch’ullos all over Cusco, but the most beautiful, and the most highly prized, are those that are woven by hand, in elaborate designs distinctive…