I am a helicopter pilot flying for last 30 years and have been advised to wear ear plugs. I searched and tried the conventional foam plugs but was not satisfied. Finally I  came across dbsafe product on the internet and wanted to try the product. I became a big fan of their reusable rear plug which I always wear inside the headset. It refuces the external noise by atleast 20db and allows the communication to be heard clearly. I use them in all noisy environment like traffic, movies, etc. The foam ones are used where no communication is involved. A big fan of these products and I have been using since I found them in 2013. I have gifted these to my colleagues as well. Pure value for money. Also would like to mention that my audiometry graph had mantained since the time I am using these plugs.