---
product_id: 15739999
title: "Serta Tranquility Eco Firm 2-Stage Baby Crib and Toddler Mattress - Waterproof Standard Baby Crib & Toddler Mattress - GREENGUARD Gold Certified- 52\" L X 27.5\" W (50 Year Warranty)"
brand: "delta children"
price: "6656 kr"
currency: DKK
in_stock: true
url: https://www.desertcart.dk/products/15739999-serta-tranquility-eco-firm-2-stage-baby-crib-and-toddler
store_origin: DK
region: Denmark
---

# GREENGUARD Gold certified for ultra-low chemical emissions Waterproof vinyl cover for effortless cleaning 120 heavy-duty innerspring coils for firm support Serta Tranquility Eco Firm 2-Stage Baby Crib and Toddler Mattress - Waterproof Standard Baby Crib & Toddler Mattress - GREENGUARD Gold Certified- 52" L X 27.5" W (50 Year Warranty)

**Brand:** delta children
**Price:** 6656 kr
**Availability:** ✅ In Stock

## Summary

> 🌟 Sleep Smart, Grow Strong – The Eco-Friendly Crib Mattress Every Parent Needs!

## Quick Answers

- **What is this?** Serta Tranquility Eco Firm 2-Stage Baby Crib and Toddler Mattress - Waterproof Standard Baby Crib & Toddler Mattress - GREENGUARD Gold Certified- 52" L X 27.5" W (50 Year Warranty) by delta children
- **How much does it cost?** 6656 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/15739999-serta-tranquility-eco-firm-2-stage-baby-crib-and-toddler)

## Best For

- delta children enthusiasts

## Why This Product

- Trusted delta children brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Perfect Fit:** Standard 27.5" x 52" size with square corners for secure crib & toddler bed placement
- • **Safety First:** Non-toxic, chemical-free materials exceed CPSIA & flammability standards
- • **Built to Last:** Robust 35-year limited warranty for peace of mind
- • **Dual-Sided Design:** Infant firmness meets toddler comfort with a natural cotton layer
- • **Effortless Maintenance:** Waterproof cover ensures quick cleanups and lasting freshness

## Overview

The Serta Tranquility Eco Firm 2-Stage Mattress offers a dual-sided design with 120 innerspring coils for optimal infant and toddler support. Featuring a waterproof vinyl cover and GREENGUARD Gold certification, it ensures a safe, non-toxic sleep environment. Sized to fit standard cribs and toddler beds, it comes backed by a 35-year limited warranty, making it a durable, health-conscious choice for modern families.

## Description

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. Designed by the same brand that’s been leading the way in mattress innovation and technology for more than 80 years, Serta’s crib and toddler mattresses deliver the same quality craftsmanship and attention to detail as their adult mattresses. All Serta crib mattresses are GREENGUARD Gold Certified and meet the strictest standards offered by the GREENGUARD Environmental Institute, which recognizes products with low chemical emissions, contributing to improved indoor air quality.

## Features

- WE PUT BABY’S SAFETY FIRST: Non-toxic construction is free from harmful materials/chemicals | Mattress meets or exceeds flammability, lead, phthalate and CPSIA testing and does not contain toxic fire retardants.General Note: Please allow 24 - 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state.The expansion time of the mattress will vary as per the surrounding
- DUAL SIDED FOR INFANTS AND TODDLERS: At the core 120 heavy duty innerspring coils offers ideal firmness for babies and toddlers | An additional layer of naturally blended cotton layer on toddler side provides enhanced comfort
- WATERPROOF FOR EASY CLEANING: Vinyl cover is waterproof | Full perimeter border wire creates a stable surface throughout the mattress
- GREENGUARD Gold certified: recognizes products with low chemical emissions, contributing to healthier environments | CertiPUR-US certified: made without PBDE fire retardants, lead, formaldehyde and other harmful materials
- MORE IMPORTANT INFO: Mattress comes with limited 35-year warranty | Made in USA | SIZE: 27.5"W x 52"L x <6"H (fits standard cribs and toddler beds) | Square corners to help with a secure fit inside the crib and toddler bed

## Product Details

- **Brand:** Delta Children
- **Size:** 27.5x52x6 Inch (Pack of 1)
- **Product Dimensions:** 52"L x 27.5"W x 6"Th
- **Item Weight:** 15 Pounds
- **Item Firmness Description:** Firm
- **Top Style:** Foam
- **Cover Material:** Vinyl
- **Number of Layers:** 3
- **Fill Material:** Memory Foam
- **Special Feature:** Premium,Waterproof

## Images

![Serta Tranquility Eco Firm 2-Stage Baby Crib and Toddler Mattress - Waterproof Standard Baby Crib & Toddler Mattress - GREENGUARD Gold Certified- 52" L X 27.5" W (50 Year Warranty) - Image 1](https://m.media-amazon.com/images/I/71WNw0JjkPL.jpg)
![Serta Tranquility Eco Firm 2-Stage Baby Crib and Toddler Mattress - Waterproof Standard Baby Crib & Toddler Mattress - GREENGUARD Gold Certified- 52" L X 27.5" W (50 Year Warranty) - Image 2](https://m.media-amazon.com/images/I/71jQ-eCAQoL.jpg)
![Serta Tranquility Eco Firm 2-Stage Baby Crib and Toddler Mattress - Waterproof Standard Baby Crib & Toddler Mattress - GREENGUARD Gold Certified- 52" L X 27.5" W (50 Year Warranty) - Image 3](https://m.media-amazon.com/images/I/61SDuFKev3L.jpg)
![Serta Tranquility Eco Firm 2-Stage Baby Crib and Toddler Mattress - Waterproof Standard Baby Crib & Toddler Mattress - GREENGUARD Gold Certified- 52" L X 27.5" W (50 Year Warranty) - Image 4](https://m.media-amazon.com/images/I/71ciWgfVKrL.jpg)
![Serta Tranquility Eco Firm 2-Stage Baby Crib and Toddler Mattress - Waterproof Standard Baby Crib & Toddler Mattress - GREENGUARD Gold Certified- 52" L X 27.5" W (50 Year Warranty) - Image 5](https://m.media-amazon.com/images/I/71iRSoYi9sL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Frequently Bought Together

- Serta Tranquility Eco Firm 2-Stage 6" Premium Baby Crib Mattress & Toddler Mattress - Waterproof - GREENGUARD Gold Certified - 50 Year Warranty - Made in USA
- Sealy Baby 2-PACK Fitted Waterproof Infant Crib Mattress Protector Pad and Toddler Bed Cover, Durable and Comfortable Topper, Machine Washable and Dryer Friendly, 52” x 28”- White
- Burt's Bees Baby Essential Organic Cotton Fitted Crib Sheet, Breathable for Boy Girl Standard Crib & Toddler Mattresses

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-27*