Good value
Have used these for multiple concerts.  Really helps.  The bass at certain EDM festivals however are too strong for these ear plugs - I would recommend getting stronger ear plugs if you are going to concerts with 100k watt+ sound systems.  The clip on keychain holder is very very handy and has a o-ring on it for waterproof seal.  Have had mine for 4 months and have used a dozen+ times with no visible signs of wear.
Rating: 4 stars