Because many people wear indoor, it is short and easy to use. I think that it is lighter than I thought, and I think that heat will not stay more than any other company with a vent used before. It may be effective that the vent of the top of the head is large. I feel a feeling of release of the top of the head by ventilation, but I do not know the effect of outdoor work in the summer yet. Although it is a design (design) which is difficult to balance the trade-off between protection and opening, I think that it is well done. The color is white / black two tone, but if there is white of the same color if there is an opening cover, there it was there.