The A.C.I.S is a revolutionary helmet liner that is used in the PremAYR and RawAYR helmets. This patented technology enables a person to customise the helmet by inflating or deflating  the inner liner, and thus delivers a truly bespoke fit. With a size range of 53cm-64cm it caters for a large spectrum of head shapes and sizes due to its adaptable nature.

The liner feature in the AYR model helmet range is called A.C.I.S™  that stands for  Air Cushion Impact System

The A.C.I.S™ is inflated by a pump and features a release valve to allow the air to be released from the unit. The larger button that you see on the right in the adjacent photograph inflates the liner whilst the button on the right is a release valve that returns the liner to its original state when pressed.