Color: Gray Size: 37-38 Material: PU The insole is invisible design. No one will know the secret of your increased height. The three available heights are perfect for different occasions, such as meetings, appointments, weddings, shopping or any event with cameras lurking around. Benefits: The insole is super lightweight and soft, perfect for improving performance and reducing pain during physical activity. Good cushioning effect can reduce impact on the joints and muscles. All Day Comfort: The heel cup helps maintain stability and position the heel naturally to make your heel more comfortable. Super Shock Absorption: The elastic rubber insole is specifically designed to fully absorb shock and reduce the pressure on the foot with each step. Suitable for high-intensity sports and helps reduce sports-induced fatigue, such as shin splints, running knees, and plantar fasciitis.