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Started out with an HJC it was heavy, not a perfect fit and the venting is pretty bad= lots of fogging. Recently got a scorpion EXO 400 online, much tighter fit- a little too tight. Much better venting & lighter. The shield changing is not all that easy and does seem like the shields could pop off in a crash.
My next purchase will be something higher end and will be purchased from a real store where I can actually try them on to get a good fit and be able to see & compare how well the visors work, seal and switch.