Hovding, a company in Malmo, Sweden has developed an “invisible” helmet that is worn as a collar around the neck and inflates to protect the head and neck. I don’t know how tear and scuff resistance it has or what it will cost.
The device uses MEMs accelerometers and will be available from their on-line store.
Here is an embedded YouTube video of it in use with a bicycle.
[youtube d7Oud3iGXWY]
I suspect it could have some applications in the workplace, but would be limited where the hazard does not trigger the accelerometer – like a falling object. It could also be a problem if it triggered if the wearer’s head was in a confined space.