Unisex's Folding Bike Inner Tube, 1, 16 x 1-1/8-1-3/8

I want to be as fair as possible here and provide some rationale for my two star review. I have mixed feelings about this tube. I am just now changing my second flat with this tube in two weeks so I'm not happy about it. With that said, I am running Schwalbe One tires which are road tires and there is a stretch of gravel I need to pass through on my 42 mile ride. Each flat I had found a tiny rock that pierced the tire and created a slow leak in the tube. So it is definitely not completely the fault of the tube. However, in reading their product description you may be persuaded to think this tube is somehow stronger than a conventional tube- it is not. So please don't pay this ridiculous price for strength. I would also add that I was hit in the back by a scooter once on my bike and the valve of the tube was literally ejected from the body of the tube. The guys in the Brompton store said they never saw anything like that.The reason I run these tubes is because of how compact they are. I have a small bike pouch in my frame of my Brompton and I'm able to get two of these tubes in there (always carry 2 tubes). I could never do that with a conventional tube. I know you can stuff conventional tubes in the body of the Brompton but it's a pain getting them in and out and when I clean my bike. Also good to know that after weighing the Tubolito and the Schwalbe 16 inch tubes I found that the Schwalbes weigh in at 100 grams each and the Tubolito's at 40 grams each. So there's the weight saving of 120 grams.My biggest complaint about the tube is the price. It's a joke for a tube. I struggled paying $35 for them and now they are asking $40. If they really were as strong as they claim, and you could outlast the life of many conventional tubes- MAYBE it could be reasoned to pay this. But my experience with them has thus far shown otherwise.Since I already have a few with a slow leak laying around I went for the patch kit so I'll give that a go and steer clear of the gravel paths...One star deduction for false advertising about the strength, one star deduction for how ridiculous the price is, and another star deduction for increasing the price again on us!A good idea for a product but you can do better Tubolito...

I bought two of these based on the the labeling indicating that they have the type of valve needed for a Brompton. In fact the new P-Line...and perhaps others...need presta valves, not the Schrader valve which these have.