Hey Renata! Yes, we do find that our crayons are easy to rub off, but now that I’m thinking about it, we wipe them off fairly quickly once we’re done. I have had dry erase books (with markers) that have been a huge pain to wipe clean, so maybe the longer they sit, the more difficult it becomes? The mitt doesn’t seem to be made of a super special material – it’s almost like an athletic knit on the outside and a fleece on the inside… I don’t know if this helps or not! :D