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Still open, with no evidence found: What are the mattress's exact length, width and thickness?; How much does the mattress weigh?; What are the cover and the inner core made of?; Is the cover removable and machine washable?; Which safety standard or certification does this mattress meet?; Does it fit any stroller bassinet other than the Bugaboo Dragonfly?; How long is the manufacturer's warranty?; Is the mattress white or grey?; How firm is the mattress for a newborn?; Does it come with a sheet or any other accessories?; Can the surface be wiped clean, or is it spot-wash only?; What age or weight limits apply to the baby using it?.","tier":"complex","depth":"trimmed_read","model":"deepseek-flash","recall":{"note":"A CPSC recall search restricted to this manufacturer and product returned no recall records, and the Health Canada recall open data contained no records mentioning First Essentials. 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