Tasco Hard Hat Ear Muffs – Star-Lite
TASCO Star Lite – Hard Hat Ear Muffs provide low-profile dielectric cap-mount hearing protection with super-tough all plastic components for long life. Soft-Seal™ ear cushions and an even band provide unmatched comfort and fit. One mounting bracket fits all major slotted hard hats.
Also, consider 3M™ PELTOR™ Behind the Head Earmuffs