I own a Hövding, and they're supposedly six-to-eight times better than a traditional cycle helmet (particularly for neck stability):
https://hovding.com/our-vision/
https://news.stanford.edu/2016/10/03/stanford-researchers-sh...
Improvements to traditional helmets can definitely be made, although I'm not sure how practical an airbag helmet is for tobogganing, where it must also resist extended friction and multiple repeat impacts.
I own a Hövding, and they're supposedly six-to-eight times better than a traditional cycle helmet (particularly for neck stability):
https://hovding.com/our-vision/
https://news.stanford.edu/2016/10/03/stanford-researchers-sh...
Improvements to traditional helmets can definitely be made, although I'm not sure how practical an airbag helmet is for tobogganing, where it must also resist extended friction and multiple repeat impacts.