If you look at any of my pics, I used the thermal water heater blankets from The Home Depot.

I prefer that over ALL the other types...because that foil tape that we all use and love actually sticks to it

It's washable, very sturdy, insulative in nature, reflective enuff to work and very easy to handle and hang.

For you ghetto growers, its $22.00 a roll and I used two rolls in a 30" X 18" X 72" closet. Not cheap, but lasts forever. It is also extremley easy to repair or patch with the foil tape