Disappointiung
They are okay but nothing like Privines (which are no longer made).  I also don't believe they are as good as Sunmark which I tried last time.  Leader seems to require more drops to help breathing and does not last very long.  I bought them because of the 4-pack but I am sorry I did.  I will be ordering Sunmark extra strength soon. Three of the Leader bottles will never be opened and the first one will be relatively full.  Sorry.  I hate to give negative reviews.
Rating: 2 stars