1. Material: Silicone 2. The forefoot shock absorption system effectively protects ankles, knees and spine 3. Absorb pressure to support the arch of the foot and relieve exercise fatigue 4. Invisible air hole design, breathable and non-slip 5. The heel is shock-absorbing and reinforced to effectively absorb the impact generated during exercise 6. U-shaped heel cup design, better fit insole and heel
