Every twenty seconds, somewhere in the world, a diabetic loses a limb due to circulatory problems. People with diabetes have a much higher likelihood to suffer from an array of foot problems. Diabetes causes blood vessels of the foot and leg to narrow and harden. Many people with diabetes also suffer from peripheral arterial disease, which reduces blood flow to the feet. This shoe, inspired by horse hoofs, is designed to improve circulation. Flow, utilities bodyweight to create a massage effect. Upon impact with the ground, ridges inside the shoe apply pressure to the foot, just like a regular massage. Flow therefore provides the benefits of other blood circulation devices in an automatic and constant way.