Complex sentence: THINX is an American company founded in 2011 by Antonia Saint Dunbar, Miki Agrawal and Radha Agrawal that makes underwear that can be worn during menstruation as a substitute or a supplement to traditional feminine hygiene products.
Split into simpler sentences: THINX is an American company founded in 2011 by Antonia Saint Dunbar, Miki Agrawal and Radha Agrawal. Thinx is underwear that can be worn during menstruation as a substitute or a supplement to traditional feminine hygiene products.