Features: Engineered with scientific heel support and cushioning, these heel sleeves effectively distribute pressure while reducing foot fatigue during prolonged standing or walking. Features breathable cotton SBR fabric, ventilated heel design, and adjustable hook and strap for stability in hiking shoe or sports footwear. Ideal for runner, and professional requiring any day foot comfortable like nurses or retail worker. Perfect for gym, or daily commutes where heel support and heel cushioning matter most. The reinforced midsole maintains shape through intense activity while moisture wicking fabric prevents odor in hiking insoles and shoe inserts. Specifications: Component: Cotton+SBR+TPR Weight: S: 67g, M: 116g, L: 136g S Total Length: Approx. 10.62inch(27cm) M Total Length: Approx. 11.61inch(29.50cm) L Total Length: Approx. 14.17inch(36cm) Package Includes: 1 Pair Heel Cover note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.