How easy it is to breathe through this material? -128% !!!!! Harder than surgical mark!!!! --- Researchers’ Pick for Best-Performing Homemade Mask Material Bas

How easy it is to breathe through this material? -128% !!!!! Harder than surgical mark!!!! --- Researchers’ Pick for Best-Performing Homemade Mask Material Based on particle capture and breathability, the researchers concluded that cotton t-shirts and pillow cases are the best choices for DIY masks.