This product consists of a piece of thin flexible insulating material, adhesive backed velcro and white electrical tape.Problems:1. Instructions are three pictures with little more information.2. Velcro was all crumpled as received and was stronger than the adhesive. When i tried to disengage the velcro both pieces came off and the paint from the ceiling.3. White electrical tape was horrible... cheap, narrow and it fell off in less than 1 hour.4. The price is a ripoff.I am building my own which is easier to use, cheaper, more attractive, and higher r-value. I am surprised Amazon even lists this junk.