- Overall Length - Head to Toe: 52''
- Mattress Fill Material: Polyester
- Hypoallergenic: Yes
- Serta’s Tranquility Eco Firm Crib and Toddler Mattress achieves a strong stable and safe sleep surface that’s made especially for your growing baby. Built with 120 heavy-duty innerspring coils for long-lasting firmness air vents to keep it fresh plus a durable two-sided design it will withstand years of use. Just flip it as your child grows; it’s hardworking on both sides. One side provides the ideal firmness for infants while the other offers a layer of natural cotton for toddlers....