Look at this cute green animal in a Mexican hat in our Frog Sombrero Sticker! A sombrero is a type of wide-brimmed Mexican men's hat used to shield the face and eyes from the sun in the hot regions of America influenced by Spain. It usually has a high-pointed crown, an extra-wide brim slightly upturned at the edge, and a chin strap to hold it in place. By the way, sombreros, like cowboy hats, were designed in response to the demands of the physical environment.