The bag is made with water-repellent fabric, and it features water-resistant zippers to block out water on rainy days. Replaceable Wire Lock for Durability! You can use your preferred wire lock to secure the bag, and even if the wire lock gets damaged, the bag can still be used without any issues. Breathable Mesh Bottom! The bottom features a mesh design, preventing moisture buildup and keeping the interior fresh even on rainy days.