Multifunctional design: This bag is a bicycle rear seat bag and a handbag in one. The thickened handle makes lifting and carrying easy. It is compatible with mountain bikes, road bikes, and touring bikes, making it suitable for longdistance travel and daily commuting. Rain cover and weather resistance: Made of waterresistant Oxford fabric that is durable, tearresistant, abrasionresistant, and heatresistant. The included rain cover keeps contents dry when riding in wet conditions. Easy to install and secure: Attaches and detaches in seconds with adjustable straps that fit most bicycle racks, ensuring maximum stability and security. Works with mountain bikes, road bikes, ebikes, hybrid bikes, and gravel bikes. Large capacity and organized storage: Roomy enough for cycling gear such as a cycling helmet and lunch box. Features a large front pocket and two side pockets for items like towels, cycling gloves, and water bottles.