I abide by mask indoors because I believe they do likely have some effect in closed quarters with recycled circulating air.

But outside walking on the sidewalk? Pound sand. Walk single file when passing another person on the sides of the sidewalk. You're not going to get it or transmit it breathing normally for the fleeting moment you're passing somebody a couple feet away OUTSIDE.

Besides, the fresh air is good for physical and mental health (mental health they oretend to care about, we knoe they dgaf about physical health)