THE LOT CONTAINS 4 BOXES OF 50 MASK EACH. NO RETURNS ACCEPTED. SELLING AS IS. This DemeMASK Surgical Mask, made in the USA, is a top-quality product that meets ASTM Level 3 standards. It is designed for use in healthcare, lab, and dental settings and is disposable after use. The mask is made by Demetech, a trusted brand in the industry. The mask is perfect for providing protection against airborne particles and fluid splatters during medical procedures. It has a comfortable fit and a secure seal to ensure that it stays in place during use. This lot of four masks is ideal for healthcare professionals who need to use a reliable and high-quality mask for their practice.