MSA 10194798 H1 V-Gard Helmet with Fas-Trac III Ratchet Suspension | Polyethylene Shell, Superior Impact Protection, Self Adjusting Crown Straps - Standard Size in Black: Amazon.com: Tools & Home Improvement
File:US Navy 051026-N-0000X-001 Electronics Technician 1st Class Matthew Ammons, a diver assigned to Mobile Diving and Salvage Unit Two (MDSU-2), is fitted with a Kirby Morgan 37 Dive Helmet.jpg - Wikimedia Commons