Material: PU Color: Black Size: 37-38 Unique Punching And Ventilation Durable construction adds comfort, support & structure to shoes. The memory foam interlayer absorbs sweat quickly and keep your feet dry. And the holes on the inserts keep your feet breathable and fresh. Ergonomics design The three bases of the forefoot, arch and heel are suitable for toothache and poor posture. The U-shaped heel design provides stability and keeps the foot bones vertical and balanced. Podiatrist Recommended These Breathable Insoles Are Ideal For Reducing Effects Of Plantar Fasciitis, Heel Spurs, Fibromyalgia, Arthritis, General Foot And Ankle Pain Provides Immediate And All-day Relief Suitable for most shoes such as sports shoes, boots, casual shoes, hiking shoes, work shoes, canvas, outdoor shoes, etc. Man and woman.