Sanals are an open type of footwear, consisting of a sole held to the wearer's foot by straps or thongs passing over the instep and around the ankle. While the distinction between sandals and other types of footwear can sometimes be blurry (as in the case of huaraches—the woven leather footwear seen in Mexico), the common understanding is that a sandal reveals most or all of the foot (especially the toes) to view. People may choose to wear sandals for several reasons, among them economy (sandals tend to require less material than shoes), comfort in warm weather, and for reasons of fashion and attractiveness.