What helmet do you wear for commuting

Long_Time_Lurker

I just wear my Giro MTB helmet with a buff underneath to cover my ears.

As for the Headkayse - it depends what they class as multi-impact. (I'm not watching their marketing bumpf.)
My helmet has taken a few dings from branches as most of my riding is off-road, but I would never risk using a helmet where I had a crash at speed where my head hit the floor (especially if I was commuting on the road).
And I have my doubts that one would be reusable in that scenario either.

2 years after most of the articles were written and there is nothing to indicate that it has passed any impact tests or that it would be any better than what is currently out in the market.

Most importantly - even if a helmet passes the most stringent tests, it is only useful if it fits your head properly.
Not worth the risk riding without a helmet now and you can't try these on yet. Find a well-fitting helmet for £30 now and worry about the other one when it is available and people have had a chance to review them.

tgotb

Thinking about it... If it claims to be reusable after an impact, how's it absorbing the energy? Cars used to be a lot more robust before crumple zones were developed, but the occupants didn't tend to fare so well...