kitted up

Temat przeniesiony do archwium.
I kitted up in my middle layer clothes as I did not want to wear so much that I would not be able to move freely up there. The most dangerous thing apart from falling off is to be thrown against the mast, and though I would be wearing a helmet it would not be difficult to break bones up there.
Somebody can translate and tell the meaning at all?
thanks in advance.