Velvet, suede, glitter and metallics are back this season; they just come on a flat sole.

The third type had a flat sole made from stacked layers of leather.

A typical flat consists of just a nearly flat sole, and a minimal upper to hold it onto the foot.

The flat soles leave your feet unsupported, causing pain in the feet, shins and knees.

A study found that for those whose lower-back pain occurs when they walk, wearing rocker-style soles tended to lead to a worse outcome than wearing flat soles after a year.