Purchased in July 2025, I am selling it because I bought a new one. It has a surprisingly large capacity, so you can easily carry a puncture repair kit, tubes, etc. when cycling. Please comment if you have any questions. The following is the official description: Rockbros-1.7 Bicycle Bag, Waterproof, Large Capacity, Quick Release, Impact Resistant, Double Zipper Rear Bag Accessories Brand: ROCKBROS Name: Bicycle Hard Shell Tail Bag Mode: B69 Material: Special processing + Polyester fabric Weight: Approximately 210g Waterproof: Water repellent Capacity: Approximately 1.7L Product Features Can also be used with highlights, quick release, water repellent, three-dimensional shape, shock absorption, scratch resistance