Ryn Footwear is the most advanced and technical brand of shoes ever! Ryn strengthens tones and aligns the human body by recreating a natural foot strike environment. Training, Recovery, Health, Toning. Feel better, and be active with Ryn shoes. All have yellowed soles and are AS IS. Size 11 has a light black rub mark on the ankle. Size 10.5 is missing the metal on one eyelet at the top of the right shoe.