Dust Mite and Allergen Proof Fitted Mattress Encasing; “Premium Microfiber” (Full)

my doctoe recommended this for my dust mite allergy. nice but somewhat silky slippery fabric. i ended up sewing in elastic on each side to help keep it in place. it might work withinout it, if you have a deeper mattress. i actually have a waterbed wth a built in mattress pad, so it is not easy to lift to tuck in sheets. and i certainly couldnkt use an encasing. i am happy with them now. i would have rated them 5 stars if they made them with elastic all around.