Highly efficient ear muffs for protection of loud noises of all pitches in factories and areas where air compressors and turbines are used. Sound Blocker 26 has soft sealing cushions and snug, pivoting headband, Apex 30 has a padded headband and super-soft ear cushions guarantee all-day comfort, and is compact and foldable for easy storage, Noisefoe Mark IV is an adjustable head band type, Mark V is self adjusting type with a unique ball and socket holder, and Bilsom Comfort is also adjustable