mike leahy wrote:
I would glue it with copydex a patch and stitch it inside and out
I would stitch a patch on, make sure the corners are rounded so they don't stick up and catch. Make sure you sew it with a rot proof thread, polyester or nylon, and then seal the edges and the stitching with Aquasure.
Most oversuits go through on the arse, it is the nature of the beast, more so with novices who travel around caves more by sitting down and sliding down on their derrière. As cavers get more experienced at moving around in a cave, they tend to spend less time sliding on their arse, and the suit lives longer.
Knees sometimes go through as well, but most people wear knee pads, so the knees are generally protected, but expect the forearms to go at some point too as crawling results in a lot of wear on those parts...