The patented flexible frame inside of the helmet is born to improve the level of comfort for the biker. It will quickly adapt to the shape of the head, finding outright the perfect fitting. When folded it will save more than the 20% of the space, to pack it in your bag
Excellent helmet. Hits my head with a fleece hat and with a small adjustment will fit it without the fleece hat. So now I have a suitable helmet for both winter and summer. Plus it fits in my bag far better than a standard helmet.