Sure, GreenKnickers possess those qualities typically desirable in a pair of women's underwear: comfort, softness, style. But what makes them worth mentioning among a sea of unmentionables is their amusing name—or, more accurately, what it signifies. Though the briefs may come in yellow, pink and other bright colors, at heart they're all green. Featured in a new special department on FigLeaves.com that's devoted to brand-name eco-friendly underwear and sleepwear, GreenKnickers are made from organic cotton, hemp, or manmade cellulose fibers and dyes that are friendly to your skin and to the environment. Quirky bonus: They all use thermo-chromatic inks, so as the fabrics heat up against your skin, the prints change. Who said eco-friendly had to be earnest?