1. Unisex; Size: 5.9 x 15.7 inches (15 x 40 cm); Set Contents: 100 non-woven shoe covers (50 pairs) 3. Anti-slip & waterproof material: Waterproof and durable moisture barrier, reducing the risk of falling and slipping. 4. Easy to put on and take off: Easy to put on over your shoes, not easy to fall off, easy to take off. Non-slip bottom makes it perfect for outside use. 5.Application: Can be used with shoes on, to prevent soil and dust from entering a clean environment. Use for clean rooms, food processing, cleaning, factories, facilities tournaments, classroom viewing, gatherings, explanations, etc. "