Review on Topeak Aero Wedge Pack F25 Review: A 🚲 Medium, Black Bag with Fixer F25 - Perfect Bike Accessory! by David Sanchez

This is my third under seat pack in years and probably the best yet. Whatever bike luggage you buy, make sure it has two points of contact with your bike. My previous beanbag broke after years of use. The snap closure failed, but luckily the bag also had a velcro strap that connected to the seatpost. It turned out that the bag dangled with Velcro and did not fall off the bike and was not lost. In my experience, bags with a zipper under the seat (like this one) are much more comfortable and last longer than those that only use straps. Air pump, tools, tire levers, etc. with little clearance. The wedge design also means my gear doesn't pinch too much.