M-Wave Waterproof Bike Seat Bag for Cycling - Durable Bicycle Saddle Pack with Reflective Strip - Perfect for Road Bikes, Mountain Bikes & Commuting Accessories

SOLID: This bag attaches solidly with the quick clip and single velcro band. Very snug. No wobble or sway which is common with all velcro (which will eventually loosen no matter how tight you get it).SPACIOUS: And it is spacious. I can get a slime tube, tools (levers, Topeak AlienII), extra work light (I often ride after dark, commuting), and sunglasses/wallet/phone. That is BEFORE I open up the expansion zipper. So there is room to spare. This is by far the best design of bags I have seen. Easy to get at things too. And despite its spaciousness, it is absolutely and completely out of the way under the saddle. There are also a few stretchy bands underneath to attach a few more things; but I am not sure what I would want to attach there. Maybe a small pump, but I have one on the frame (6" Zefal). It also has a reflective strip on it which is a nice touch.GREAT VALUE: And the price is so good too, a great, great value. You can pay a lot more for a much inferior bag by quality and design.CONS: I have nothing bad to say about this bag. I could not be happier with it. The ONLY thing I could think of that might be nice is if there was some kind of way to easily attach my rear blinky led lights to it (3 led Planet Bike) so it was up a little higher and visible than at the bottom of my seat post (below the bag)... I'll have to figure something out...Good bag and good size, without a doubt worth the price. You can fit quite a bit inside it, however with the extra bit open there is a chance it could hit your rear tire if your seat isn't up too high. Also, without a fender or rack on your bike it gets very dirty and isn't a material that is easy to just wipe clean. Very easy to remove if you want to take it with you, and has a little loop you can clip a bike light to. I use it to keep my Two issues with this product:1 - Cool idea to have a "clip-in" mount under the seat for quick removal of the bag, the problem is it does not fit my mountain or road bike very well. In order to clip the bag into the mount under the seat, you have to smash the front of the bag into the seat post because the bag is too long to fit properly and the mount is too rigid to clip the bag in without smashing it. I put the mount as far to the rear of the seat as it would go, still not enough room to avoid smashing the bag when clipping it in. I did get the bag to go on, but due to front being smashed it does not have as much room inside as it could. May fit fine on some bikes, but they should make the attachment method more flexible so that the mount will give instead of smashing the front of the bag when clipping it in.2 - I have multiple bikes, but the clip-in mount fastens with screws so it's not easy to move the mount from one bike to the other. Maybe if you had multiple mounts you could put a mount on each bike in which case it would be easy to move from one bike to another (but then you would still have problem number 1 above).This thing is a lot bigger than it looks in the pictures. I have it mounted under my stock Specialized seat and it looks big. Not ridiculously so though, just bigger than I thought it would. But, with that size comes a lot of storage space, and the expanding options is a really nice touch for when I want to grab something small from the store!I really like how easy it is to put on and take off too. Mount the clip on your seat rails and you're pretty much set. Once that's on there, you just clip the bag on and attach the velcro strap to the seat post. It's very sturdy and it couldn't be simpler. The reflective stripe and loop to mount a light are also a nice touches.Love this bag, lots of room for all the little things you might take with you on bike rides. Only problem was First one ordered the top separated from the clip, so had to send back for replacement. The bouncing of the bike made top portion fail as pins that connect to bag not strong. Broke in about 2 weeks. Had some small tools in pouch originally, but this must have been to much weight. Whatever you put in this saddle make sure it is light. Now I have my spare inner tube in this pouch. If you need to carry around heavy objects like multi-tools or wrenches then get a handlebar pouch or something else.As described does fit road bike well. It arrived before the shipment date. It was made well and has quite a bit of room for a small bag.Sits well under seat. Compact but at the same time spacious. Fits all the necessary tools in case of an accident.it is easy to take off and go. the easier one. it is not too big perfect size for me. i can store a look (6 feet) , wallet, phone and keys with out expanding it. beautiful.Get the right colour and it is a good purchase but......its not completely waterproof,recommend you put items in a bag inside. Alot of storage though and it expands..its a bit like a certain time travelling box ! Bigger on the inside etc.Good product but you get what you pay for. Fairly flimsy and the buckle/mounting system came broken. Decided to return it.Invest a bit more and get one that won't break; buy good, buy once!!My second one - the last one survived a full year of constant abuse, and a 2week tour of France without letting me down - it ripped, but never actually failed. Brought another due to current one being just too tatty. Good VFM, huge volume. (X3 innertubes, repair kit and tyre levers)Excellent size bag, however, doesn't fit on all saddle types. Your saddle has to be full length wire rod underneath to take fitting.Really good quality product. Would have helped if came with instructions as assembly was tricky. Once on is fine