The Newton Baby Crib Mattress wins overall for its breathable design and dual-sided firmness, with the Moonlight Slumber Little Star as a top alternative for eco-conscious parents.
Choosing the right oval mattress for your bassinet is crucial for your baby’s safety and comfort. We compared top-rated options based on CertiPUR-US and OEKO-TEX certifications, firmness levels, breathability, and aggregated owner reviews to find the best picks for 2026.
Our rankings prioritize safety standards, durability, and parent-reported ease of cleaning and fit. Each mattress meets bassinet size requirements and offers features like waterproof covers or dual-sided firmness. Below are our expert-selected roundup of the seven best oval bassinet mattresses.
Newton Baby Crib Mattress
This mattress features a breathable core that allows airflow to reduce suffocation risk. It has a two-stage design with a firmer side for infants and a softer side for toddlers. The cover is waterproof and machine-washable.
Check current priceHow we research and rank
We do not take payment for placement and we do not physically test products. Rankings come from manufacturer specifications, material certifications (CertiPUR-US foam, OEKO-TEX textiles), and the weight of aggregated verified owner reviews, analyzed for durability, heat retention and sagging. The scores in this guide are MattressVetted editorial research ratings — our assessment of the available evidence, not customer star averages. See how we rate.
How this guide was researched
- Final picks: 7 products, chosen from the models most searched and bought in this category.
- Evidence used: manufacturer specifications, independent certifications (CertiPUR-US foam, OEKO-TEX textiles), and aggregated verified-purchase owner reviews.
- Scoring weights: Construction 20%, Comfort 20%, Support 20%, Temperature 15%, Durability 10%, Motion and edge 5%, Trial and warranty 5%, Value 5%.
- Testing: we do not physically test products. Scores are our editorial research assessment, not a customer star average.
- Research reflects: July 2026.
Full method on our how we rate page.
The picks, compared
Newton Baby Crib Mattress
Most bassinets; breathable and washable · Type: Foam | Firmness: Firm (infant side) | Trial: 100 days
This mattress features a breathable core that allows airflow to reduce suffocation risk. It has a two-stage design with a firmer side for infants and a softer side for toddlers. The cover is waterproof and machine-washable.
What owners report: Owners praise its breathability and ease of cleaning. Many report it fits standard oval bassinets perfectly and holds up well over time.
- Breathable core
- Dual firmness
- Machine-washable cover
- Higher price
- Slightly heavy
Moonlight Slumber Little Star
Eco-conscious parents · Type: Foam | Firmness: Firm | Trial: 30 days
Made with plant-based foam and a cotton cover, this mattress is Greenguard Gold and CertiPUR-US certified. It is firm and waterproof, with a non-skid bottom for safety.
What owners report: Owners appreciate the eco-friendly materials and non-toxic construction. Some note it fits snugly and retains shape well.
- Eco-friendly materials
- Waterproof
- Good value
- Not dual-sided
- Cover could be softer
Colgate Eco Classica III
Warm sleepers · Type: Foam | Firmness: Firm | Trial: 30 days
This mattress has a cooling gel memory foam layer and a breathable cover. It is Greenguard Gold certified and features a waterproof liner. The firmness meets bassinet safety standards.
What owners report: Parents report it sleeps cooler than other options. Many find it easy to clean and durable for everyday use.
- Cooling gel layer
- Greenguard Gold
- Firm support
- Memory foam may retain impressions
- Limited trial period
Halo Bassinest Swivel Sleeper Mattress
Bassinets with unique shapes · Type: Foam | Firmness: Firm | Trial: 30 days
Designed for the Halo Bassinest, this oval mattress is contoured for a perfect fit. It is firm, hypoallergenic, and has a waterproof cover. The foam is CertiPUR-US certified.
What owners report: Users say it fits the Bassinest perfectly and provides good support. Many appreciate the easy-to-clean cover.
- Perfect fit for Halo Bassinest
- Hypoallergenic
- Waterproof
- Only fits Halo Bassinest
- Not dual-sided
Graco Premium Foam Crib Mattress
Budget-conscious parents · Type: Foam | Firmness: Firm | Trial: 30 days
This affordable mattress offers a firm support core and a waterproof cover. It is lightweight and easy to fit into oval bassinets. CertiPUR-US certified for safety.
What owners report: Owners find it a great value for the price. Some mention it may be thinner than high-end options but still comfortable for babies.
- Affordable
- Lightweight
- Waterproof
- Thinner profile
- Less breathable
Sealy Baby Firm Rest Crib Mattress
Parents wanting maximum firmness · Type: Foam | Firmness: Extra Firm | Trial: 30 days
This mattress is designed with extra firm support to reduce suffocation risk. It has a waterproof cover and is hypoallergenic. The foam is CertiPUR-US certified.
What owners report: Owners report the firmness is ideal for bassinet safety standards. Some say it’s less cushioned but reliable and easy to clean.
- Extra firm
- Hypoallergenic
- Affordable
- No soft side
- Cover may be noisy
BubbleBebe Waterproof 2-Stage Crib Mattress
Parents wanting dual firmness on a budget · Type: Foam | Firmness: Firm (infant side) | Trial: 30 days
This mattress features a dual firmness design with a firm infant side and a softer toddler side. It has a waterproof bamboo cover and is CertiPUR-US certified.
What owners report: Parents like the two-stage versatility for the price. Some note the cover may slip slightly but is easy to remove for washing.
- Dual firmness
- Bamboo cover
- Affordable
- Cover may shift
- Not as breathable
Frequently asked questions
What size oval mattress for bassinet do I need?
Most oval bassinets use a standard size approximately 30×15 inches, but always measure your bassinet before purchasing. A snug fit with no gaps is essential for safety.
Is a firm mattress necessary for a bassinet?
Yes, a firm mattress reduces the risk of suffocation and SIDS. The Consumer Product Safety Commission recommends a firm, flat surface that does not indent when the baby lies on it.
Can I use a crib mattress in a bassinet?
No, bassinets require specific oval or rectangular mattresses that fit tightly. Crib mattresses are typically larger and may create dangerous gaps.
What certifications should I look for?
Look for CertiPUR-US (foam safety) and OEKO-TEX (fabric safety). Greenguard Gold is also beneficial for low chemical emissions.
How often should I replace my bassinet mattress?
Replace when it shows signs of wear, such as indentations, stains, or tears. Typically, a bassinet mattress lasts for the first 6 months until the baby outgrows the bassinet.
The verdict
The Newton Baby Crib Mattress is our top choice for its breathable core and dual firmness that fits most oval bassinets. For eco-conscious parents on a budget, the Moonlight Slumber Little Star offers great value with plant-based materials. If cooling is a priority, the Colgate Eco Classica III provides excellent temperature regulation.
