Madewell Greta Ballet Flat A comfy classic, these leather ballet flats with an elastic strap are a complement to any warm-weather 'fit. Plus, our MWL Cloudlift Lite padding makes it feel like you're walking on a...well, you know. - Leather upper. - Leather lining. - Man-made sole. - Do Well: leather sourced from a tannery that was certified by the Leather Working Group (LWG), an organization that works to promote sustainable environmental practices in the leather industry. Imported.