There are many reasons why people prefer sunglasses made out of wood. First off, wood is an organic material. This makes the temples smoother as the wood adapts to the person wearing them over time. Secondly, wood is eco-friendly and doesn't harm the environment as much as other materials usually do. Many people prefer wooden sunglasses as they are highly comfortable, especially when wearing them over longer periods of time. For that reason they are specifically suitable for those having trouble with headaches or migranes.