CIRCLE WITH A DOT

@skyfaller Sorry, infodump afterthought, many masks require that you bend a nose wire/bar to fit the nose bridge.

Zimi is a little different, the internal frame maintains the filter shape, but does not hug the nose bridge, instead there's a soft sealing skirt which accommodates the nose bridge.

The Zimi nose adjustment is to cut the skirt to shape instead of bending a wire. I have a generic hole punch to make a circular hole at my predetermined position, then I cut the skirt up to the hole.

They sell cutting guides and hole punches, but I think not strictly necessary, you can just gradually increase the cut depth on your first filter until you determine where it sits best on the child.

Cut sticker - Protective Masks

Cutting sticker for mask sealing ring The average delivery time is 8-15 days

Protective Masks (zimiair.com)

(I mention it as I've seen people online who didn't realise adjustment was via skirt trimming, and seemed to be upset that they had to cut the skirt. Also there was a big fit testing account on the other place back in the day that specifically used this as a reason why Zimi is no good.)

@skyfaller I know the first two. I think Zimi is great, I highly recommend, no reservations, can be worn all day, really ZM95S saved us. Trident just about works, but I'm not a fan, it relies on strong straps squishing it onto the face, the straps tend to want to pull the nose bar flat again, it's painful, wear for a couple of hours max, and it didn't seal well under the chin for us. Either way, hope of the three you find one that works for you.