I just purchased a 3 inch latex topper to add to my 8 inch latex mattress.   The original mattress is sealed in a nice wool/cotton cover but my topper is loose over this mattress.    I covered the latex topper with an old fitted  sheet, then a stretch cotton/polyester mattress pad, then the fitted bottom sheet.   I chose to order the topper without a cover to avoid the "slip" factor.   The latex sits on a non slip mat on top of the original mattress and so far has not moved at all.

My question is---is this setup the best I can do or is there another suggestion?  I hate wasting the nice wool/cotton cover on my original mattress but it is not removable.  Would I gain anything by buying another cover to surround the entire 11 inches of latex in one unit?

Thanks for any replies.