Sizes
Maybe my nose is too big. But I bought 2 of them after measuring my nose to ensure I got the right range/intervals.<br />I measured my nose with a ruler as shown in the instructions before buying the product but I still bought 2 sizes that are small for me.<br />In addition, the distance between each filter is a bit small and they don’t go as far as I would go.<br />I wore them for 4 hours and despite them being small for my nose, it was hard to breathe.
Rating: 3 stars