The Modular Suspension System (MSS) consists of an impact liner, adjustment band per quadrant, comfort pad system, and restraint system. The impact liner is made of low-profile impact material and exceeds the ACH impact standards of the US Army. EEUU. An adjustable crown net allows perspiration to dry and provides comfort. It suspends the shell of the helmet on the head of the user, whereby the impact liner does not come into contact with the head, which allows a flow of free air coolant to circulate. The system adapts to small, medium, large and extra-large helmets. Available in black and tan color.