On my recent trip to Vietnam, it was a thrill every time I spotted someone wearing a Nón Lá, the traditional conical hat made out of palm leaves and a prevalent symbol of Vietnam. And, after sporting one in both heinous heat and pouring rain, I soon discovered it is the ultimate all-weather hat. Not much has changed with its design over the centuries. Nothing is more effective than combatting the blistering Southeast Asian sun and tropical monsoons. Here are some photos I took of the phenomenal conical.