Beneath the outer shell is the core layer, which is comprised of hundreds of flexible columns that act like shock absorbers. This layer is the heart of the Vicis helmet, and was developed with the help of Per Reinhall, head of the University of Washington’s mechanical engineering department and a co-founder of Vicis. The columns, which vary in length and thickness depending on their position in the helmet, are made from a resilient polymer that bends in any given direction when compressed.