The well ventilated receptor flow has a slimmer design to sit more snugly around the head yet maintains excellent levels of rider protectionpocs pro riders had requested a slimmer fitting helmet and the receptor flow is the result the density of the eps liner has been optimised to offer the best levels of protection and has increased thickness over the most vulnerable areas the liner is protected by a tough pc in mold shell plus the front of the helmet has a section where you can add on th