Sean, Thanks for the reply. You can request a sample from Tenmat. I sent for one last week and am waiting for it to arrive. One of the compelling factors in my interest is that they are light weight and nest like plant pots. This will make it easy to get them into the attic spaces and to take up less space in the truck.
Note, however, that they are NOT airtight. I looked at a couple at a trade show, and I could blow air right through them. So if you are planning to use them to air seal over can lights, you need another layer on top of thim