Women across America voted and Safety 1st earned the title of America's Most Recommended™ brand for Crib & Toddler Mattress. Sweet dreams begin with the perfect baby crib mattress, which is why we've created the Safety 1st Nighty Night Crib & Toddler Bed Mattress. It is made with a high-density thermo-bonded polyester fiber core that offers ample ultra firm support for your little one. This lightweight and durable mattress is then wrapped with a 100% Vinyl outer cover that is waterproof and stain resistant to wipe clean in an instant. The Nighty Night crib & toddler bed mattress fits standard cribs with internal measurement of 28⅝ in. X 53 in. This Safety 1st mattress is made without the use of flame retardant chemicals and has achieved GREENGUARD Gold certification, meeting the standard for low-chemical emissions for a sleep environment that's always safe and sound. Assembled in Canada, this Safety 1st mattress comes with a 10-year limited warranty. Perfect for a night of sweet dreams!