I saw a load of people with masks today while out, some looked to be like what bikers / cyclists wear, so a pretty good fit and no fiddling.
Some had the blue medical ones, fiddling with it or only covering their mouth. (I had to wear these years ago in my first paid job, one size fits all doesn't work and due to them moving you do keep touching it).
Others were making do with a scarf / snood, nose/ mouth covered, no fiddling.
I also saw people wearing latex gloves, defeats the object touching everything, loading up the car and touching it as it's potentially transferred to inside your car.