I have no experience with the Coghlan's, but they list it at 12 oz. At that weight I'd rather be packing my silnylon tarp. I just received 3 of the Heatsheets (2.8 oz) from REI, and as far as durability goes they are lightyears ahead of the standard space blanket. Think of them as a heavy duty 5' X 8' orange plastic sheet with reflective mylar on the other side. I'll be junking my other space blankets in favor of these as fast as I can remember where I stashed them. <img src="/images/graemlins/smile.gif" alt="" />