RP - If you want the "most for the least" in foam pads, get one made from Evazote. It's the warmest foam, most durable and most resistant to ultraviolet. There's an article at the MEC website
here. MEC is like the REI of Canada - excellent stuff at a reasonable price, and they haven't forgotten their roots. I bought an Evazote from them years ago - still going strong.
As for durability of foam pads - blue foam is rather low. OTH - I bought a military issue pad thru an Army/Navy store a zillion years ago, and it just won't die. A friend and I used it one time as a sled to help a woman would had wrecked her knee. Granted, it was downhill, and mostly over snow and ice, but there were a few rocky spots, and she sat on it, held the sides, and we slithered her down the mountain about 1/2 mile on it and met the SAR unit coming after her. The pad survived fine - just a few nicks. I like it because it has some light nylon straps glued to it so it can secure it quickly.
