It's a pretty cheapo copper mat off Amazon. Yes you do have to be a little worried about it being too hot, the packaging says up to 500 degrees. I have read other professional cooks who say 400 degrees is probably the max you should do on any Teflon/non-stick surface. Under most fires we probably would have had it off to the side a little more and getting less direct flame - but the wet weather made getting a really hot fire going very difficult. They work really slick though.
It is a Stowmaster net... It was sort of our trip running joke because this one was TOO BIG. They make multiple sizes of it and I had went to Marine General a couple days before the trip to get the Mr. Walleye version of this net. Well they only had the next size up and I was waffling, but the sales guy offered me 10% off, SOLD! I knew it was a mistake the second I swiped the credit card. Long story but if you can get the size below this one it would be perfect. Definitely pricey - I know you can find it a lot cheaper than the link below though (maybe even get the 10% off at MG if you look like an easy mark :) .)