... *15/20/25/30/40/45 material:crumb rubber weght:3.8/4.8/5.3/ ... , entertainment places, arena, fitness center, gymnasium, Judo and wrestling room, hotel corridor, amusement park, elderly activity ... performance in all weathers.5. Ventilation. (Water and steam)6. Neutral chemistry property.7. None peculiar ... Excellent resistance to rusty.10. Anti-bacteria and micro organs.11. Durable for longtime use.12 ...