The coat is long, soft, fine, and there is no undercoat. Some lines tend to have very wispy, sparse coats, other have quite luxurious locks. Harleys can suffer from skin conditions so you should talk to your breeder about their lines and if they have any issues with hair loss, scaly skin or dryness. Our rats tend to deal with dry skin check out our blog for more info on Harleys. Be prepared for the hilarious molting in their first 3 months of age.