Maximize your storage with our Multifunctional Rear Bike Bag, designed for convenience and versatility. This compact bag easily attaches to your bike rack and features expandable pannier saddlebags for extra carrying capacity when needed. Made from durable, water-resistant materials, it keeps your essentials safe and dry, while multiple compartments and reflective accents ensure organization and safety. Perfect for commuting, touring, or running errands, this bag adapts to your needs and fits most electric and traditional bikes.