Usually those blankets are mylar.
killerweed420 Reviewed by killerweed420 on . Reflection of light. I know Mylar is the best reflector and after that would be smooth white paint. But i was in a shop today and they were selling Thermal Blankets.Very thin Im not to sure of the material but they are coated with aliminium, Would these work well if i taped it to some card board and hung it above my lights to shine the light down? Rating: 5