Ventilation is essential. With mouth and eyebrow massive and multiple air vents system, JUST1 J32 is designed to maximize airflow to your head. Tried and tested ventilation that allows for proper Extraction of heat from the helmet, allowing for a cooler ride in even warm weather conditions. Attention was also paid to the metal membrane integrated on the chin air vent, which makes it less likely that rubble and flying debris could penetrate those areas.