introducing the RUNWAY construction: this construction features all the same details that make our shoes distinctive: soft leather uppers and signature turquoise leather lining and poron® memory foam footbed, with ground cork beneath, that forms to your foot over time, making incredibly comfortable shoes. hand-lasted and sewn with a leather welt by genuine goodyear-welt construction. rubber roadkill outsoles and toplifts made of recycled tires using the LightTread ™ process add lightweight flexibility, comfort and durability! heels are genuine stacked leather and the entire shoe is then hand-finished to ensure each shoe has its own unique character.