Sustain is a New York based company founded in 2013. They produce and sell all kinds of products tampons, pads, and liners to underwear, period cups, and condoms packed in customizable period kits on a subscription basis. Sustain's goods are eco-friendly and chemical free. In their certificate portfolio, they have certificates like Cruelty-Free, B Corporation, Made Safe, Certified Vegan, USDA Organic, Fair Rubber, and Non-GMO. Also, Sustain supports the charity by giving 10% of its profits to women's healthcare organizations.