The founders of Resprana, an air filter that fits discreetly inside your nose, discuss why they felt like there was a need for a product that was more practical than the pollution masks already on the market. Depending on where the filter is being used, it can last anywhere from a couple of days to a week. The product recently received funding that's primarily being used for testing and development. CEO Sophie Frank notes the importance of experimenting and testing the product in various markets before bringing it to market. The goal is to create specialized devices depending on a customer's place in the world. Resprana CRO Micah Steiger notes that the funding will help determine when the product goes to market.