A Swedish company called Multi-directional Impact Protection System - MIPS - has revived and patented the slip plane concept, using two layers in the helmet to help the head rotate slightly on impact. The hope is to reduce the rotational component of an impact, thought to be a prime brain injury mechanism and related to concussion.
Are they made is Sweden? a rather expensive place to make things rather than China , that so Many companies use.
Is that the only source or do they License their Patent to other companies?