I have 4 of these all got new but used a variable number of times one hardly at all (and it's the worst affected) the rubber coating on the inside has almost totally worn away. I accept that the material and rubber may be all one IYSWIM but the material is fine it's the rubber bit.
Any ideas what to do? I'm guessing they are no longer waterproof?
Anyone else have same problem?
Any idea what customer service is like? Will manufacturer send me some more? (I have no receipt, some were got from council etc but they should last surely)