Double layer, Surefire Sonic defenders and definitely electronic muffs if indoor.
Colion Noir likes those in earphones you're talking about, I just prefer passive ear plugs. I'd be afraid these plugs would jump out my ear and some fruitloop stomping it.
I usually look at how well electronic earmuffs perform when off. A set of Champions I've got is great I usually let the daughter wear those. Wife likes the Peltor 6s she snagged them, light and fairly good at blocking out sound.
I run MSA Sordins I like them but are okay at blocking sound more of a COMSpurpose, so they are not for everyone.