The best helmet I have currently is the Aegis
USSEPA helmet; I know State Line carries them and Horse/Rider
online.
They do have that knob at the back and are
reasonable priced. You could add a Cashell brim or one of the velcro on
ones. It's the most comfortable helmet for my head.
What is the name of the helmets (and the
cheapest place to buy one) that has an adjustable knob for the size of the
helmet? I would like to wear a knit cap underneath in the winter and NOT
in the summer and be able to adjust it with just the turn of a knob. I
am looking for one that covers the base of my skull in the back and one that I
can get a huge brim to block the sun.