Should you double mask against COVID-19? St. Louis health experts weigh in "If you feel like your mask doesn’t fit well or gaping on the sides and you feel another mask will help make it stay in place, then that provides some value" Author: Justina Coronel (KSDK) Updated: 10:21 PM CST January 27, 2021 ST. LOUIS — Are two better than one? This may be the case for mask-wearing. With new COVID-19 strains circulating, the head of the St. Louis Metropolitan Pandemic Task Force thinks that's the reason double masking became a more prominent idea. "Because they are transmissible that means the probability to get infected is higher," Dr. Alex Garza said.