Shane and Sia Barbi, most notably known for their Playboy centerfolds and modeling careers, are now lending their faces to a documentary on the fur industry. They appear on the promotional poster for Shannon Keith’s recently released documentary Skin Trade, which delves into how fur garments are produced. The poster features Shane and Sia, who appear to be beaten and covered in blood. The sisters founded Kitty Liberation Front, which donates all of its proceeds to animal charities, and published The Eco Anti-Diet, which also benefits animal welfare causes.