Waterproof Bicycle Bag Cycling Rear Seat Post Bag Reflective Large Capacity Extendable Tail Rear Bag MTB Road Bike Bag Shockproof Bicycle Storage Bag Bike Accessories

Features:
Portable and simple installation.
Made of high-quality material and excellent workmanship, sturdy, durable, s wear-resistant and not easy to deform.
Large capacity with mesh pocket and extended design allow you to take some small tools and items like smart phones, wallet, keys, and other small items.
Reflective strip design and taillight haner, enhances visibility at night, safer. （ Taillight is not included.）
Elastic rubber and hook make it stable and strong adhesion.
Glued double zipper, dust-resistant and slightly waterproof.
Can be installed on mountain bikes, folding bikes, road bikes, etc.