This week's edition of Fitted Fridays takes us to Tucson, Arizona, a city directly west of the vast Sonoran Desert, the hottest desert in both Mexico and the United States. What makes the Sonoran Desert unique is that it actually experiences two seasons of rainfall which creates a stark contrast between aridity and moisture. This week's cap is inspired by one of the Sonoran's residents: the Horned Rattlesnake, also known as the Sidewinder. The Sidewinder is a venomous pit viper and is found in the desert regions of the Southwestern United States and northwestern Mexico.