Adult: 19.20 - 21.3. Dimensions of the transparent sheet. Thanks to this solution, your mask will be clean and more comfortable to wear.
Compatible with average adult face and head size. Before and after use, properly disinfect the headband with 99% isopropyl alcohol. Wash the transparent film with soapy water.
This product is manufactured to be easily disposed of and replaced in highly contaminated environments. The plastic printed in 3d is made from biodegradable pla. The transparent pvc plastic sheet is of lower quality compared to the transparent 3m transparent poly carbonate sheet. Face shields deal with two key ways of preventing the transmission of coronavirus: they are a barrier to respiratory droplets (which, according to CDCs, can occur when a person coughs, sneezes or speaks) and help carriers avoid touching their faces.
In addition, unlike n95 masks and respirators, they cover the eyes as well as the mouth and nose, allow easier communication, and are easier to clean (with just soap and water or household disinfectants) for reuse. They offer a better barrier to respiratory droplets than tissue masks, but should be used with a mask for protection against the airborne virus.