Sweet dreams begin with the perfect baby crib mattress, which is why we've created the Safety 1st Sweet Dreams Baby 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 waterproof crib mattress fits standard cribs and toddler beds with internal measurement of 285/8 in. X 53 in. Made without the use of flame retardant chemicals, PVC, lead or phthalates 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!