The Giro Seam helmet features the wonderful Thermostat vent system, Giro's Stack Vent, and a feather light weight. What does all of this mean? It will keep your temp under control, your goggles clear, and your comfort level at an all time high. Finish it off with the best fit system ever made for a snow helmet and you are ready for a full day on the mountain. The In Form Fit System makes it easy to dial in a custom fit in seconds even with your gloves on. An ergo-friendly dial at the base of the helmet provides up to 4cm of adjustment and enhanced stability while the vertical tuning feature accommodates different goggles and head shapes for a custom fit, free of goggle gap. Thermostat ventilation control allows you to custom tune airflow instantly with a simple, low profile control button on the outside of the helmet. No other system is faster or easier to adjust, and nothing is more effective at keeping you comfortable. Giro's Stack Vent was developed based on research showing the majority of the warm air that can cause fogging exhausts from the center top vent of the goggle. Aligning the Stack Vent in the helmet with the center vent of your goggles helps to keep them clear and fog free while maintaining total helmet and goggle integration. When it comes to protecting your head, pick up the Giro Seam helmet today.