The Kunert x Lanius Blue 90 Tights contribute to the cycle of nature with these opaque tights. These tights are natural and environmentally friendly, because the Blue 90 is biodegradable and made of ECONYL® yarn. The tights are black and have a comfortable waistband that does not pinch and therefore does not leave annoying marks on the skin. These Blue 90 tights are a must for anyone who wants to dress environmentally conscious.