![INSTINCT, Grey Orange Matte-No Lens Reference, hi-res image number null](https://www.bolle.com/dw/image/v2/BFJW_PRD/on/demandware.static/-/Sites-bolle-master-catalog/default/dwd48e246c/images/Instinct_Grey Orange Matte-01.jpg?sw=800&sh=800)
INSTINCT
![Test section image FitGuide](https://www.bolle.com/on/demandware.static/-/Library-Sites-BolleEUSharedLibrary/default/dwb05b7764/pdp/fit_guide/helmet-fit-guide-Cat5-ENG.jpg)
PROGRESSIVE EPS
MAXIMUM VENTILATION WITH HIGH PROTECTION
![](https://www.bolle.com/on/demandware.static/-/Library-Sites-BolleEUSharedLibrary/default/dw1ac8e6d4/pdp/technologies/technologies_avid.png)
![Image casque 2](https://www.bolle.com/on/demandware.static/-/Library-Sites-BolleEUSharedLibrary/default/dw756cc397/pdp/technologies/casques-img-2.jpg)
![Image casque 3](https://www.bolle.com/on/demandware.static/-/Library-Sites-BolleEUSharedLibrary/default/dw08dee84a/pdp/technologies/casques-img-3.jpg)
![Image impacts](https://www.bolle.com/on/demandware.static/-/Library-Sites-BolleEUSharedLibrary/default/dw72da6f40/pdp/technologies/casques-img-4.png)
A MIX OF ACTUAL AND VIRTUALLY DIFFERENT DENSITIES EFFECTIVELY MANAGES DIFFERENT KINDS OF IMPACTS
![Image faible densité](https://www.bolle.com/on/demandware.static/-/Library-Sites-BolleEUSharedLibrary/default/dwccd6f1a1/pdp/technologies/casques-img-small-1.jpg)
![Image haute densité](https://www.bolle.com/on/demandware.static/-/Library-Sites-BolleEUSharedLibrary/default/dw7f04bcbd/pdp/technologies/casques-img-small-2.jpg)
To create helmets that perform against all types of impacts, the details are key. High-density EPS ensures that high energy impacts are effectively absorbed. Low-density EPS, however, provides superior performance against less severe impacts. Bollé helmets with AViD liner technology use a combination of different EPS densities and/ or optimization of the ventilation channels to virtually decrease the density in the upper area. The result is a lighter, better-ventilated helmet with progressive shock absorption that will absorb a wider range of impacts*. (Available on the Trackdown & Instinct.) *compared to a standard EPS liner with uniform thickness.
Low Density Foam: Optimum absorption at medium impact energy, may compress completely in high energy impacts.
High Density Foam: Imcomplete compression at low impact energy, optimum absorption at high impact energy
Ventilation channels: virtually decrease density
Actual densities