This t-shirt is made of 100% polyester and is designed to protect you from the outdoors. The shirt is protected with UPF 30 - which means only 1/30th of the sun's UV rays can reach your skin! It is also quick dry and can be worn in the water. The honu also represents long life and prosperity The hook is the sign of the provider. The legend goes that the demigod Maui fished out the Hawaiian islands with his magical fish hook. He also slowed down the sun to allow the Hawaiian's kapa (cloth) to dry. This shirt not only has meaning, but will support you in the great outdoors!