The strap broke on one of the masks. We had to fish it through the mask with 2 pairs of tweezers and tied the thing in a knot and put it in the middle of the mask to hide it. I hope they last. I really like them otherwise.
Having lived in very polluted cities in the past, I’ve owned numerous masks. This is probably the lightest I’ve had, which also makes it more comfortable for longer wear. Some masks also have big edges that leave marks on your skin. I haven’t had this issue so far. While many masks are reusable by switching out the filter, this one can also be washed so it should last longer as well. Overall very satisfied and highly recommend it!