Oh my! Oh my! I love this featherbed. I was reluctant to buy it but I am so happy I did. My mattress is firm so, having this gave my husband and I the comfort we can afford. When buying sheets and mattress protectors, allow for 4-6 inches in fitted sheet sizes. Example, with this 5 inches feather bed raising my mattress to 18 inches, I use a 22-24 inch mattress protector and 22-24 inch sheets. Anything less would flatten the featherbed out and you want that extra space so it stays fluffier.
I LOVE THIS!