Two flats within 15 kms. pinch flats, slow leaks , the works! easily susceptible to damage when fitting, puncture resistance =
000.0000! Never go on a wet road with these on;
surely there are better tubes out there.
No wonder 90% of bike shops in my town stock these in copious amounts; they're good disposable earners, good turnover! they are C.R.A.P!