From Glow Recipe serums to Luna Magic lashes, “Shark Tank” has given us some pretty amazing fashion and beauty products. One of the most memorable pitches that didn’t strictly fit into the fashion space — but is still useful to those who love their cashmere sweaters — is Unshrinkit. The self-explanatory business appeared on Season 7 of the show in 2015 with a simple yet revolutionary idea: a product used to restore wool garments that had shrunk in the washing process back to their normal size, negating the need to throw them out. 

The brains behind the idea were CEO Desirée Stolar, a graduate of Harvard Business School, and fellow graduate and engineer Nate Barbera. Stolar first thought of the concept after accidentally shrinking one of her sweaters while she was still at Harvard, which prompted her to search for ways to fix it. When she came across infinite DIY content online about unshrinking wool clothing, she thought there might be a market for this product, and she was right. Barbera used his mechanical engineering background to come up with the solution, which is essentially a formula that impacts the fibers of the wool so they can grow back to their proper size again.