1. Material: breathable mesh + metal zipper + oxford sole
2. Avoid the breeding of bacteria in rainy days and the scratches of glass stones
3. Comfortable and not stuffy
4. The sole is soft and easy to bend, non-slip and wear-resistant
5. No. 1: length 3.5 cm, width 2.7 cm, weight 75 grams
6. No. 2: length 4 cm, width 3.2 cm, weight 87 grams
7. No. 3: length 4.5 cm, width 3.7 cm, weight 99 grams
8. No. 4: length 4.8 cm, width 3.9 cm, weight 112 grams
9. No. 5: length 5.3 cm, width 4.2 cm, weight 125 grams