"The inch-long larva is generously coated in long, luxuriant hair-like setae, making it resemble a tiny Persian cat, the characteristic that presumably gave it the name “puss”. It is variable in color, from downy grayish white to golden brown to dark charcoal gray. It often has a streak of bright orange running longitudinally. The “fur” on early-stage larvae is sometimes extremely curly, giving them a cottony, puffed-up look. The body tapers to a tail that extends well beyond the body, unlike its relative M. crispata.[4] The middle instar has a more disheveled, “bad-hair-day” appearance, without a distinctive tail. The “fur” of the larva contains venomous spines that cause extremely painful reactions in human skin upon contact. The adult moth is covered in long fur in colors ranging from dull orange to lemon yellow, with hairy legs and fuzzy black feet. " - wikipedia
While I was on a jungle trekking tour the guide told my group to never rest your hand on the wooden rails where the caterpillars will be crawling about. They were furry like this too!
Not necessarily to this level, but a lot of caterpillars will cause skin reactions.
Yeah one of my clearer memories from when I was about 5 was touching one of these things. It was extremely fucking painful. The memory is still seared in my brain.