1、Ergonomic Headband: This noise canceling ear muff features an ergonomic headband with soft padding that reduces pressure on the head for superior comfort. 2、Excellent ABS Material Shell: The shell of this noise canceling earmuffs is made of excellent ABS material, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 3、Adjustable: This noise canceling earmuffs and headband are adjustable, you can rotate the earmuffs can to fit all sizes from children to adults. 4、Folding Design: This noise canceling earmuffs fold up nicely and take up very little space in your backpack or briefcase. 5、Wide Application: This noise canceling earmuffs are perfect for sporting events, studying, woodworking projects and lawn care, and great for operating heavy machinery or landscaping business.