waterproofing depends by the type of the weave and chemical treatment at the time of finishing of cloth. Denier refer only for fineness/ thickness of fiber,filament and yarn.
190T refers to the thread count. A higher number means more threads per inch. I am not sure, but I believe that denier refers to the thickness of the thread. Thicker is stronger but rougher. See this...
I am assuming you are talking about a fabric made from either 1200 or 600 denier yarn. The thickness of the yarn in 1200 denier is twice that of 600 denier, which also implies the fabric will be...
I don't know about the 600 denier polyester fabric but a mouse in my house chewed through some of the man-made material of the sandals in my closet! They were a thick metallic fabric.
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