People have cured in plastic bags for decades. These grove bags are an obvious gimmick with the "terp lock" technology, which, if you read their website=plastic...Seriously, terp lock technology=black plastic. It's fine, I'm sure they work like any other plastic bags of a certain thickness. I've done like Jimmi when drying in paper bags, if they're drying too fast I'll put the entire paper bag into a garbage bag to slow them down and sweat the buds. I don't like to keep buds in plastic for long term storage though.