Wearing masks stops the spread, so imagine COVID-19 if everyone acted accordingly and wore their masks. People are dying, people are losing their jobs, people are being evicted, companies are losing business, essential workers are getting sick, and that only increases the scarcity of everything when you think about it.
It doesn't require you to wear it in your car, just wear it in stores and public buildings around others, and when you're in crowded spaces and areas where you will interact with things where the public, in general, will go (i.e. gas stations).
Not sure what type of mask is most effective? Take a look at this lab test from June, where the Florida Atlantic University researchers developed a cough emulator lab configuration to determine what the most effective mask would be. The focus is air droplets and how effective certain masks are, and we have the most effective masks in the test available for you w/ a coupon code to save 15% off. So take a look at the video to verify for yourself, and... let's flatten the curve.