Version 2 of the Nuri face masks have several updates for both comfort and durability. The ties are now two long pieces to which the mask is secured in the middle, this prevents the notches for fit from separating over time.
The notches themselves are asymmetrical, one side has a larger notch, the other a smaller one which allows you to choose your preferred fit.
These masks tie behind your head, and have notches to form the fit around your nose and chin. The straps can also be tied in a way that creates custom ear loops that fit will yet do not pull.