For me at least, they helped out a little bit with heat.
The snakeskin set I bought are supposed to be their thickest, so my leg resting on thick rubber is better than resting on the hot frame :lol:
And the way the XB is designed, with the indents for your legs, it gives you something to grip onto while tucking rather than airbox plastic and gas tank metal... That I keep waxed :rolf: