Protective "Secure+" Disposable Face Mask Lavender ASTM F2100 LEVEL1 Larger Size Extended Coverage Best Secure Fit 4 Pleats This mask is manufactured in accordance to ASTM F2100 LEVEL1 standard. Product Overview Double bendable aluminum strips each on chin and nose for ultimately secure fit Wide open size for cooler and fresher breathing Soft and ink free inner layer 4 Pleats for extra protective ... Xiantao S&J Protective Products Co., Ltd