The Meridian features a magnetic retention clip that easily flips up to go over the elastic of your mask, ensuring a secure fit and easy handling, even with mittens. It also offers a full liner but can be easily removed to leave only the tightening system and a minimum of cushioning foam, with no visible velcro, for use of the helmet on spring days or with your favorite thin hat if you wish. All in an ultra-light, high quality construction consisting of a layer of EPS foam molded directly into a lightweight polycarbonate shell.