Can you use a waterproof mattress protector and a cot sheet for baby to sleep on, or will this increase their temperature when sleeping?
Red Nose recommends the following in relation to a mattress protector.
“A soft mattress or sleeping surface can increase the risk of sudden unexpected infant death if baby rolls over onto the tummy. Remove plastic packaging from the mattress and always make sure that the waterproof mattress protector is strong and a tight fit. Never put soft bedding under the bottom sheet, such as a sheepskin, as this makes the sleeping surface too soft.”
Any soft, padded or loose mattress protector may reduce the firmness of the mattress which may be a risk to the baby, particularly if they roll onto their tummy.