Flip-flops are a very basic type of footwear. They are essentially a thin rubber sole with two simple straps running in a Y shape from the sides of the foot to the join between the big toe and next toe. Some include a strap along the back heel. The popular use of flip-flops as simple warm climate beach or outdoor wear has spread through much of the world, although it is most common in India (where it is immensely popular and called a Hawaii chappal), Australia, New Zealand, USA, Brazil, the Pacific Islands, and Southeast Asia.
