Pure Hockey Says: The IMS 9.0 is a great helmet for those seeking style, comfort and protection. It features their pro-styled low-profile shell, with central tool-free adjustment. The liner is Bauer`s V2 liner system. This combines lightweight Vertex foam which has significantly improved impact management and a thin layer of VN foam for great comfort. The VN foam is slow memory comfort foam, meaning over time it will mold to your head. it also has PORON XRD foam inserts for additional comfort and great protection from impacts. The occipital lock is spring loaded, so it does not need to be adjusted. The IMS 9.0 has strategic vent ports for great breathability and is treated with MICROBAN antimicrobial protection.