But in 1919, Edward D. Bullard of San Francisco, California developed the first hard hat, basing it on the Doughboy helmet he wore as a soldier in World War I. The helmet was made of canvas, glue, and ...
I was almost ready to DIY another helmet some years ago when I heard about Cardo’s Packtalk Bold comms system - and that they had partnered with JBL for the in-hat speakers. I gave it a try and ...