Sheets, waterproof sheets and mattress protectors serve different needs. A regular sheet finishes the sleeping surface, while a protective layer helps keep the mattress clean. Compare construction, fastening and whether a separate sheet is needed on top. Choose the size according to the mattress width, length and depth.
Measure the width, length and height of the mattress layer the sheet will cover. Choose matching dimensions and sufficient pocket depth. A sheet intended for a thin topper may fit differently from one designed for a deep mattress.
Follow its specified wash temperature and drying instructions. Avoid washing it with sharp zips or other parts that could damage the membrane. Straighten after washing and allow it to dry completely before making the bed.
Follow the care label attached to the specific product. Choose the stated temperature, wash cycle and drying method. Care depends on material and construction: similar-looking textiles can have different instructions.