Kimberly-Clark, an American multinational personal care corporation that produces mostly paper-based consumer products, completed its $25m investment in Thinx, a producer of reusable period underwear. The investment is expected to get the online brand into more mainstream retailers like Target and Walmart, and will also enable the startup to launch a lower-cost line of period underwear, with prices between $15-$19 per pair, versus current prices that are between $32-$39.