3M Hard Hat H-701V-UV, UVicator Sensor, Vented, 4-Point Ratchet Suspension, White Revised, easier assembly instructions Assembly video also available  Available in the image area to the left 4-point ratchet suspension allows wearer to customize height and fit. UVicator sensor shows when it's time to replace hard hat due to UV exposure ANSI/ISEA compliant when worn in the forward and reverse donning positions Vents allow air circulation to keep worker cooler and more comfortable