antares sellier precision helmet foamThe foam inside the helmet is made from lycra for enhanced rider comfort. It is removable and OEKO TEX certified, making it easy to wash and ensuring hygiene and comfort during use. Each foam pad is labelled with its head circumference size Provides an excellent fit for different head shapes Highly breathable Compatible with "Prcision" helmets Use the size guide to find the right foam size for you You can swap the inner helmet foam as your head size