Its hard to look at the US Armys latest helmet and not think of Halo, but the design does have a purpose beyond gaming chic. Its latest soldier of the future concept would not only protect grunts in high heat and humidity, but also shield them from chemical and biological agents. While much bulkier tech already exists for that, such a model would use a fan embedded directly into the filtration system to suck air from the side of the mask and blast it across the nose.