Rash guard shirts protect skin from chaffing against a waxed surfboard.
While it is one of the least likely considered areas to apply a sunblock or sunscreen, the scalp is actually prone to sunburn and chaffing from intense UV exposure.
You'd look fine, said a corporal, chaffing a thin little soldier who bent under the weight of his knapsack.
"Are you bowing to a friend, eh?" remarked another, chaffing a peasant who ducked low as a cannon ball flew over.