mylar?

Hello i am setting up my grow box. i am going to line the sides with mylar but i am unable to find it? where does they sell that shit? is it only online?

google places around your area, and if you dont find any luck try an online store

try any place like home depot or lowes or even wal-mart with a garden center...or nurseries...network for it

the dollar store mirror gift wrap works well if not the same as mylar.