We’ve discovered nice, plain color tights at Gudrun Sjödén (pronounciation: gadrandssjzzzee) that are made of recycled materials – in Italy! so there’s nothing bogus about them. They even come cheap if you buy two of them at the same time.
The good news is that you can wear them with other outfits as well (in case you don’t feel hippie anymore)!
Check them out at http://www.gudrunsjoden.com/uk/all/products/clothes/size-xxl/tights-in-recycled-polyamide-e-75810_xx30_00007 or just go to http://www.gudrunsjoden.com and search for ‘tights’. They have local shops for many countries and you’ll able to switch on their website.