Capacity and organization: Two large side compartments provide a combined capacity of 30–40 L, giving you room for clothing, tools, groceries or a weekend kit while keeping items separated and easy to access. Secure attachment: Designed as a rear rack/saddlebag, this pannier mounts reliably to the bike carrier. The mounting system keeps the bag fixed in place so your load stays stable while riding. Rigid structure for easy handling: Each pannier includes a rigid insert that preserves shape, simplifies packing and unloading, and helps the bag stay accessible even when partially filled. Wide compatibility: Multi-function rear seat bag works with most bicycles, including mountain bikes, and can also be used on motorcycles when mounted to a suitable rear carrier. Practical performance: With 30–40 L total volume and two side pockets, the bag converts your rear rack into usable cargo space without complex adjustments. The rigid construction also helps prevent sagging and rubbing against the wheel. Use scenarios Daily commute: Carry a change of clothes, laptop sleeve or locker items neatly separated between the two compartments. Weekend bikepacking: Pack sleeping gear and food across the two side pockets for balanced weight distribution on long rides. Errands and shopping: Mount on a rear carrier to transport groceries or parcels securely without needing a backpack. What you get Two roomy side pockets (total 30–40 L) Rear rack/saddlebag design that attaches to a carrier Rigid internal support for shape and easy packing Compatibility with most bikes, including mountain bikes, and adaptable for motorcycle carriers This pannier is a straightforward, practical solution when you need reliable, organized cargo capacity on the rear of your bike or motorcycle carrier.