PIP® Traverse™ Industrial Climbing Helmet with Mips® Brain Protection System Vented 280 HP1491RVM Color:Gray Elastic waist band and adjustable Elastic waist band and adjustable suspenders This inherently flame resistant fabric features a dual layer construction with a tight knit design The Traverse™ Mips® offers a low friction layer that allows the head to move inside the helmet (10mm – 15mm relative motion in all directions) which can redirect the harmful rotational motion otherwise transferred to the head Mips® (Multi directional Impact Protection System) Brain Protection System for Industrial Safety Helmets is a low frictional layer designed to reduce rotational motion transferred to the head from angled impacts