The 3D honeycomb structure fits closely with the chest!
 
Light and flexible chest padding fits closely with the chest. The honeycomb structure absorbs the shock to the chest.
CE : EN1621-3:2018
Soft Velcro to be sewn onto the wear other than hit-air is supplied with the hit-air.
To attach to any other jacket or vest, sew the Velcro (female)- supplied with the hit-air-onto it.