#2340: FoamDome

I’m now officially obsessed by cycle helmets (in addition to helicopters, crowd dynamics, Aston Martins…)

Imagine if sunglasses contained a number of small spray cans of that fast-setting builders’ foam used for sealing gaps in walls etc.


The resulting solid is fairly flexible and surprisingly impact-resistant. One might even employ the kind of foam used in non-lethal weapons to restrain rioters (but without the adhesive).

The sunglasses could be arranged so that an accelerometer detects any untoward movement towards the ground.

This would open the valves on the spray canisters, allowing the foam to escape and set within a few tens of milliseconds (ie before impact with vehicles or the road).

The effect would be to have a helmet’s protection without having to wear one.

It might later be really difficult to get out of one’s hair, but better that than a trip to an operating theatre.

Similar canisters could also be inserted into small pockets at the elbows and knees of one’s clothing.


  1. You might be interested in this airbag helmet: http://www.youtube.com/watch?v=g3S62ZtyiRg

    Pretty amazing!

    • Thanks Matt,
      This is all the more impressive because the inventors spent years being told it was impossible. Fantastic to have actually got it on sale. I really hope they don’t get sued for infringement by some smartass lawyer. The movie shows how horrifically vulnerable cyclists are. I’m still a bit concerned about people who fall face downwards.

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