Retro helmets are a different breed. While we can compare them to our modern Shoeis and Arais, they’re really not in the same category in terms of technical performance. They tend to be similar in weight, but lack the venting, noise control and efficient wind visors of their more modern styled brethren. Protection wise, they tend to be more evenly yoked, using the same multi density EPS liner to absorb impact in the case of a crash. This helmet has only one source of venting aside from the wide front opening, the slots in front of the mouth. They don’t close, but I don’t think closing them would do much good anyway, as the eye hole is so big you would undoubtedly get a ton of air through there regardless.