Invest in a Lowe Alpine Triple Point Mountain Cap, far far better than any fold away hood.
Some hoods, have rather poor adjustment, and get blown to kingdom come in bad weather, offering little or no protection.
My Mountain Cap is one of the best bits of kit ive bought over the years, and there are simply few fully waterproof caps or hoods to rival it.
They are fully adjustable for all head diameters, and have a nice cosy fleece lining.
It really comes in handy when its throwing it down, even in the summer months, and ive even used it in the depths of winter whilst climbing Snowdon for the New Year.
Mine is in Red, but they are in a few varying colours, and at around £35, its a great investment for year round use, and very high quality.
Its biggest bonus, is that its fully waterproof, and keeps your head warm, and if adjusted properly, it stays glued to your head.