Thats not a product issue mate, you got dupped by a KB'r! Revit gear is pretty bloody good from my experience and I have some gloves from them very much like those ones (different coloring..just black) and have had them for years. I'd say some sort of chemical has been spilt on them at some point and has fu#ked the material...which has just fallen apart as you have used them. You can never make an accurate judgment on the quality of a product unless you have purchased them from the supplier brand new and know for yourself the complete history of the item.
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