Delta-V, also known as Delta Velocity or “Contrecoup”, is a cycle helmets “rebound” against the direction of initial impact, unfortunately with the brain still travelling down in the opposing direction.


Traditional Expanded Polystyrene helmets compress and rebound to around 30% of their initial impact (insert reference here). This has been seen as a necessary risk given the benefits of said helmets in managing initial impacts. Until now..


Enkayse demonstrates less than a 5% return of energy on impact, dramatically reducing risk of Delta-V damage to the brain.


Which would you rather have on during a fall?

What is Delta-V ?

In this context, Delta-V is the impact your brain receives from the opposing bounce from the rest of your head exaggerated by a traditional EPS helmet.

Why is Delta-V high in EPS?

Expanded Polystyrene (EPS) once compressed on an impact will reach a stage called "densification". When there  are no more air bubbles to compress the now "solid" material simply bounces back of the floor as the energy has to travel somewhere. This is very bad.

Enkayse is safer.

Enkayse as a foam, allows more travel and has a lower point of densification than EPS, thus the return of energy is less than 5% of an original impact.