3Mâ„¢ pro-grade earmuff offers superior comfort and protection. The 3Mâ„¢ Pro-Grade Earmuff is designed to be a high noise reducing/protection earmuff. Adjustable, vented headband design reduces heat build and improves comfort when worn with hats. Part of the 3Mâ„¢ Pro Series Safety Products line that was designed for the way pros think, the way they shop and the way they work.