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Not very long. You should restrict wearing the visor to 2 hours per day. Visor beanies, while they look cool, can be very dangerous. The beanie part of it squeezes all the way around your head, restricting your blood flow ever so minutely. This affects the brain and hair follicles. Beanies are bad enough, but when you add the visor, that rigid surface on the front blocks even more blood flow. Never wear a "veanie" longer than 2 hours, anything over that and your asking for complications.

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12y ago

What else can I help you with?