Originally Posted by Fleabane
They are made from 11gram Decitex (sp) or should that be Duratec ?? and classed as Heavy Duty
So seems okay :-)
Decitex is the middle layer fabric measurement not a fabric itself : (denier is used in USA, decitex in countries that uses metric system) the higher the number the stronger the fabric material. Duratec, strongan are other fancy pvc names, would have my doubts if it's heavy duty. Usually pvc 0.9 mm has 1,000 denier/1,100 decitex and 1,050 gr/per square meter, if a bit more denier/decitex, probably 1.0 mm fabric.
The only way to find out is to fold a portion of a deflated tube in 2 and measure with a vernier, it it has 1.8/ 1.9 mm is standard pvc and nothing to worry about. The duration will depend entirely on how it's maintained and cared as stated by spartacus.
If you don't beach your sib very often probably won't need the extra tube protection, will need adequate temperature, fabric cleaners, 2 parts glue and spare pvc fabric. Too complicated to do it yourself.