In addition, a Florida Atlantic University engineering professor has studied the efficiency of different mask materials. This information will be used to improve the masks. The results were positive. The companies will continue to work towards 510(k) certification in order to sell directly to hospitals. The new all-black AmeriShield face masks will be available at Party City in mid-March. In addition to being a top option for hospital purchase, Premium-PPE plans to introduce all-black versions of its products.