Flip Flops are sandals that have a piece of material separating the big toe and second toe and then attached to the sole on the sides of the foot to secure the shoe. Flip Flops are typically made out of rubber or rubber-like materials.
About Memory Foam:
Memory Foam is a type of high density synthetic material designed to provide support and protection.
Memory Foam conforms to the pressure of weight or heat and has the property to return to its original shape after the pressure is released.