Bauer IMS 9.0 Hockey Helmet Combo meets a selection of different features as PORON XRDT foam inserts, treatement is done with MICROBAN, it is an antimicrobial protection to reduce odors and resists mildew. CSA, HECC, CE certified. For best fit ergo translucent ear covers built in, triple density chin cup, fit is customized with the central Tool-Free Adjustment enchaned with Spring Loaded Occipital Lock. Helmet has ventilation ports.