Originally Posted by sopenderope

what material are those blankets made of?
i've seen a few people talk about them but i've never picked one up and looked

another good choice for reflective material would be mylar, you can get rolls of it to line your walls,

just keep in mind if you build a light reflector and youre using an hps or mh light youre gonna need something to resist the heat from the light since it would probably be pretty close to it.