what's the hump for?

Just a quick question - I'm looking at some leathers and they can come with a "racing hump" or without. What's the hump for? Aerodynamics or is it a safety feature?
Thanks in advance
Thanks in advance

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Blurr wrote:it provides neck support?
Blurr wrote:your faster with a hump
gpxpunk wrote:there is suits with smaller humps, but as i said i wont buy another jacket with one.
But with a 2 piece suit with a hump really looks retarded. thats why it suits me.
robracer wrote:Blurr wrote:it provides neck support?
If you have a long neck..... I am with Dave anything behind the head interferes with the helmet
Blurr wrote:your faster with a hump
Look faster& if you are lucky it has a bladder as a camel bak for mobile refreshments