Denims are perfect.
Bare-legged people will suffer not only from mosquitoes, flies, thorns, briars, and possible poison ivy, but also from the stings of nettles. That poison contains the formic acid also present in the stings of bees and ants. The quickest relief is obtained by mashing the leaves of sourdock or other acid plant into a pulp and smearing that over your skin. The slimy juice of the jewelweed is another remedy. The stinging nettle has thousands of poison-loaded hairs which antedated, by millions of years, the hypodermic needle and syringe invented by a French physician in 1853.