Heidi Zak is the co-founder of ThirdLove, an innovative bra and underwear brand that was the first to offer half-cup sizing and a patented mobile sizing app which allows women to measure themselves at home. The San Francisco based company was founded in 2013, and recently raised over $8M Series A funding from investors including Laurie Ann Goldman, the former CEO of Spanx and Lori Greeley, the former CEO of Victoria’s Secret Stores.