Give your baby a good nights sleep with the nighty night open coil cot mattress with coolmax this firm mattress has an open coil spring unit with a polyester fibre filling for added insulation the coolmax quilted stretch knit cover reduces overheating to provide the perfect sleeping temperature there is a waterproof wipeable pvc coating underneath the top panel so the mattress can still be used when the cover is being washed choose from a continental or cot bed sized mattress to suit your