3M SecureFit Safety Helmet is a climbing-style helmet that delivers all-day comfort without sacrificing security. From our proprietary design to our industry-leading innovations, the 3M SecureFit Safety Helmet is engineered with workers in mind. The result is a revolutionary helmet design that delivers comfort without compromise. Suspension system incorporates exclusive patented 3M Pressure Diffusion Technology. Works with a variety of 3M Faceshields, Earmuffs and other accessories.. Suspension system incorporates exclusive patented 3M pressure diffusion technology. Works with a variety of 3M face shields, earmuffs and other accessories. Meets ANSI Z89.1. Climbing helmet-inspired design. Customizable fit with multiple levels of vertical adjustment