I've been using the JXFUKAL Rear Bike Rack Bag for a few months now, and it's become an essential part of my cycling gear. The 7L size is perfect for my daily commutes, fitting everything from my wallet and phone to a spare tube and tools without feeling bulky.

What really stands out is how securely it stays in place. The Velcro straps are strong, but like others mentioned, I added a bungee cord for extra peace of mind on rough trails. It hasn’t budged an inch, even during bumpy rides.

The waterproof feature has been a lifesaver. I got caught in a sudden downpour last week, and thanks to the included rain cover, my phone and snacks stayed completely dry. The reflective strips also give me confidence when riding at dusk—they’re surprisingly bright when headlights hit them.

One quirk: The bag does collapse when not full, which makes stuffing in rigid items like my Kindle tricky. But the trade-off is that it folds flat when empty—super handy for storage.

For the price? Absolute steal. It’s survived snow, mud, and 90°F heat while keeping my gear organized and protected. If you need reliable storage that won’t break the bank (or your bike’s aesthetic), this bag delivers.