All of these styles are crafted in eco-friendly fabrics, which are indicated by a "symbol in product descriptions. These pieces are predominantly made of an Italian fabric in regenerated Nylon. This fabric has mild compression with excellent recovery to help decrease the production of lactic acid. It also has a soft, air-weight feel that is silky, breathable, and boasts SPF 50+ protection. Can a legging help your workout? Well, we think so! And the fact that it is eco-friendly? BONUS POINTS!