Are leather safety gloves washable?
Leather and/or pigskin gloves are washable:


knock loose dirt/soil from them
while still wearing them, apply a dollop of mild dishwashing soap to the palm of one glove then rub them together with cold water and rinse; a brush can be used for extreme soiling
lay them out flat to dry, indoors or out (do not machine dry them)
the washing/drying process can make them stiff so after they are dry, apply saddle oil, Neet's Foot oil, mineral oil, saddle soap, or some type of oil that won't go rancid. This will make them supple again.


A good pair of leather gloves will last for years if you take care of them.