Hey all! I'm hoping some current Cuddle Ewe owners can help me out. I'm in the market for a Cuddle Ewe, but I don't know whether to buy the flannelette or the slip cover to help protect it. I e-mailed the company to ask, but the response I got didn't really answer my question. Which one would you recommend to protect the underquilt from damage/staining from liquids and pokey pet nails? Do either of them affect the temperature regulating quality of the mattress? Is there a benefit to having both? Thanks in advance!