Love macks. These ear plugs work the best for me! I always have them on hand for vacation or when i know I might not get a good night sleep due to noise. The only downfall is they roll up weird and kinda gross so you can't rewear!
These worked great for a nascar race that i attended. the only thing i do not like about this type of earplug is having to squeeze them so small to get them to go in where they need to go be effective.