かりん7777 1 These bicycle bags are very large capacity and the material they are made from seems to be fairly robust. They have reflectors on the back which work well.But, the bags are not really very well designed.First problem is the straps which hold the bags on to the pannier mount on the bicycle. There is nowhere to put the end of the straps, so they end up plink-plink-plinking on the spokes. The "holder" on the top of the bags is even worse, there are two long straps which end up flapping around in the breeze. I ended up using crocodile clips to tame these flapping straps.Second problem is that the inner sides of the bags have no rigidity, so they instantly bend around the pannier frame, which just looks ugly, and it can turn into a real problem if the inner side of the bag starts rubbing against the spokes. Properly designed bicycle bags have a rigid inner part to prevent this.Third problem is the low-slung pockets on the outside are basically useless, except for filling when the bag is full. If you put stuff into the pockets when the rest of the bag is empty, the pockets are very low and they end up making the bag sag.So these bags are OK, and I'm using them without major problems at the moment, but I would not call them an absolutely brilliant design.