For those looking for a tube with a French valve (the F/V or presta) that can take liquid to seal the holes, know that this tube has a removable presta core, meaning the entire mechanism can be removed to allow the liquid to be added. It claims to be puncture-resistant, but this is obviously not true; it has punctured within a week of getting it. However, I ran over quite a few thorns and only found one hole, so it might be a bit tougher than other thinner tubes.