Comfortable, effective hearing protection.
I used them when operating my lawn mowers and my gasoline powered string trimmer.  They are easy to insert and are comfortable although I need to remove them periodically to give my ear canal a rest.  I have had to do that with other similar devices.  One tip I would give is that they are easier to insert if you put them briefly in your mouth to moisten them.  I observed race car drivers doing that before inserting their ear plugs. They do a great job of cancelling noise.
Rating: 4 stars