Helps with nighttime allergies especially if you are allergic to dust mites. Fits a full size bed and comforter. Mattress cover <https://allergystore.com/collections/allergy-proof-mattress-covers-and-encasements/products/mattress-encasing-allergycare-organic-cotton?variant=17247130288199> $60 OBO Duvet Cover <https://allergystore.com/collections/allergy-proof-duvet-and-comforter-covers/products/duvet-comforter-cover-allergycare-organic-cotton?variant=17247137955911> $40 OBO Will sell separately! -Naomi