Sleep Philosophy Assure 300TC Waterproof Mattress Pad - White - Full by Sleep Philosophy. $39.99. Now you are guaranteed to have a quiet night with this 300 TC cotton sateen mattress pad filled with hypoallergenic fiber and felt knitted waterproof back. The diamond quilted skirt/pocket provides a snug fit and will fit mattresses up to 17. 300tc cotton sateen double insertion bleached face, 3.5oz/y2 6D fiber fill, diamond quilted, felt and kniited waterproof back, 15 skirt
They sell these tins at craft stores in the wedding section (use a coupon to get a good deal) attach strong magnets. I got a metal board from Ikea and they just magnet on there. You could also paint a cookie sheet any color you like and use that.