Oh I didn't expect it was, looks like a layer of heat resistant material and shock cord. If so do you mind stating which material (carbon felt?) and if its shock cord how long does it hold up in terms of shot strings? IE I'm sure if you heat up the heat resistant material too much the shock cord starts to overheat and in that case I'm guessing it looses elasticity prior to melting? Edit: or maybe kevlar cord?It does work, but it is not a commercial item.
I'm asking cause I just got my first can and noticed the mirage after a bit but don't really care for the bulky covers on the market and just want something simple like that.