Frequently Asked Questions

The Basics

What ages can use Lullabee?

Newborns through toddlers, but the eariler the better. Any child that can safely sleep in a crib can sleep on a Lullabee mattress. Our mattress fits any standard crib. It is safe and gentle for infants and toddlers.

How does Lullabee work?

Lullabee looks and feels like an ordinary crib mattress. However it has sensors embedded deep within the mattress to detect when your infant is awake and crying. It then soothes them back to sleep with gentle vibration and sound. It slowly stops soothing once the infant has fallen back to sleep.

But the goal of Lullabee is to adapt to your child's sleep needs and patterns. It works in two distinct phases – Support Phase and Weaning Phase. It moves between these phases automatically based on your child's sleep patterns.

During the Support Phase, Lullabee provides gentle vibration and sound to assist with falling back asleep and turns off when it detects your child has fallen back to sleep. The Weaning Phase gradually reduces the support, fostering independent sleep. Lullabee allows customization with various vibration patterns and audio options. More info here.

Is it safe?

Yes. Safety has been our top priority from the very beginning.

Lullabee was invented by a pediatric neurologist and sleep medicine physician. It is a standard crib mattress that provides a firm, flat sleep surface and does not incline, rock, or change shape. It has undergone extensive third-party testing and meets all applicable federal crib mattress safety standards for firmness, chemical testing, flammability and EMC/RF.

The soothing vibration and sound are intentionally gentle and activate only when Lullabee detects that your baby has awakened and is fussing.

Lullabee is powered by a rechargeable lithium iron phosphate (LiFePO₄) battery, one of the safest and most stable lithium battery chemistries available. The battery has also passed UL2054 battery safety testing for additional peace of mind.

Lullabee is designed and manufactured by a medical device engineering firm in the United States.

How does it differ from other “smart” sleep products like bassinets?

The goal of Lullabee is to foster independent sleep. Lullabee uses your child's previous sleep patterns to make changes automatically and, eventually, make the technology unnecessary so that Lullabee becomes just a comfortable crib mattress. But it's always ready to help again when the sleep regressions occur. It's a truly personalized technology.

Here are some additional differences from other smart mattresses and bassinets on the market:

  • You can use Lullabee from birth until your child is too big for the crib (although you can still use it in your toddler bed!).
  • Lullabee automatically learns your child's sleep patterns and responds appropriately. When your child sleeps well, it gradually decreases the intensity of sound and vibration your child can receive.
  • Lullabee provides vibration and sound ONLY when your child is awake and crying. This is typically only a few minutes at night. In the clinical trial, Lullabee turned on an average of 8 minutes per night.
  • No swaddle is needed. Children can move and wiggle to their heart's content if and when you don't use a swaddle.

Bluetooth or Wifi?

The optional app connects to Lullabee via Bluetooth, a low-energy connection designed to protect your battery while keeping things secure.

Features and Functions

How does Lullabee know if my child is awake and crying?

Lullabee has sensors deep within the mattress that can detect movements and analyze sound.

What audio and vibration patterns are available?

Check out the images on our product page for a full breakdown.

Is Lullabee a baby monitor?

No. Lullabee is designed specifically to help your child sleep. It does not serve as a baby monitor and you will not get any real-time feedback from Lullabee. If you're looking for a baby monitor, we highly recommend our friends at Nanit.

Does it fit any crib?

Lullabee is designed to fit all standard-sized cribs. The mattress dimensions are 52" x 27.5" and is 5" thick

Why can't I make the mattress vibrate or play music whenever I want?

We designed Lullabee to be a true partner to parents in your sleep journey. Our goal is to get your child sleeping independently without needing special circumstances, lullabies, and vibrations as soon as possible. Lullabee works automatically, but only when your child truly needs it. If Lullabee detects your child is moving AND crying, it will produce vibration and sound based on your child's sleep patterns. You can choose what vibration pattern and audio options come from the device when Lullabee does activate. You decide the "what," and your baby and Lullabee decide the "when"!

Getting Started

How do I get started?

It's as simple as putting in the battery, pressing the power button, and selecting an audio/vibration option. That's it. Lullabee takes care of the rest.

Do I need to turn the mattress off when my child isn't using it?

It is up to you. You are welcome to leave the mattress turned on 24 hours a day. It automatically goes into sleep mode and awakens when your baby awakens.

There are two benefits to turning Lullabee off when not in use. First, it will conserve your battery. Second, the smartphone app will report how long the mattress was powered on each day. If you only turn the mattress on when your child is using the crib, this information may be helpful to estimate the amount of sleep each day.

How long should I wait to comfort my child if they start crying?

You know your child best, and Lullabee will never replace parenting. If they are hungry or need a diaper change, only a parent will do. But Lullabee can help when the child needs a little assistance to soothe back to sleep. How long to wait is your decision. However, if you want our recommendation, a conservative approach would be waiting thirty seconds for every month of age.

How long does the battery last?

The rechargable battery typically lasts 20 days or more between charges, depending on how often your Lullabee produces vibration and sound.

How will I know when the battery is low?

When you turn on the mattress, the middle power button will shine orange for a few seconds. If you are using the app, you will also get a low battery alert when you open the app.

How long does it take to charge the battery?

Approximately 4 hours.

Is it waterproof?

Yes, the outer cover for Lullabee is designed to be waterproof.

Can I wash the cover?

Yes, the outer cover is designed to be removed for washing. Please wash in cold water on a gentle cycle and allow it to air dry. The inner cover is a mandatory flame-retardant barrier that accompanies all crib mattresses and cannot be removed.

App

How does the app connect?

Lullabee uses the safety and security of Bluetooth to connect with the app. The connection is designed to work only when you need it—automatically disconnecting when the app is closed or when you move out of range. This helps keep your connection secure while also preserving battery life.

Can I connect via Wi-Fi?

No, Lullabee connects to the app using Bluetooth, not Wi-Fi. While we know Wi-Fi can be convenient for remote access, we intentionally chose Bluetooth for a safe, low-power connection that’s only active when you need it. This approach also helps preserve battery life, so your Lullabee is ready when your family needs it most.

Is the app free?

Yes.

Is the app required?

No. Lullabee is designed to work on its own and does not require an app account to use. Every core setting can be adjusted directly from the mattress, giving you flexibility and simplicity right out of the box. The app is available if you’d like additional insights into Lullabee’s performance, but it’s never required.

What does the app do?

The Lullabee app serves two primary functions:

  1. Download sleep and response data so you can better understand how Lullabee is responding to your child throughout the night.
  2. Adjust settings remotely so you can customize Lullabee without needing to touch the mattress.

The app does not provide real-time monitoring or live alerts, and it is not intended to function as a baby monitor.

Are there any subscriptions I need to pay for?

No.

How Lullabee is Made

Where is Lullabee manufactured?

Lullabee is manufactured in Cary, North Carolina by a medical device manufacturing firm called Blur. Our foam and cover are both proudly made in the USA.

What material is used to make Lullabee?

Lullabee is crafted with CertiPUR-US polyurethane foam. The foam is made in North Carolina and meets stringent criteria. CertiPUR-US foam is made without formaldehyde, ozone depletors, prohibited phthalates, mercury, lead, or other heavy metals. It also meets the criteria for low emission (low volatile organic compounds, VOCs) and is screened for relevant chemicals. You can read more about CertiPUR-US foam here.

What electronics are inside Lullabee?

Lullabee has sensors that detect movement and patterns of sound. The sensors automatically adapt to each environment based on mattress position and background noise. Lullabee produces vibration through a precise vibration motor. All the electronics are buried deep in the middle of the Lullabee mattress.

Are there any wires?

No, there are no visible wires, and there is no need to plug Lullabee into an outlet. From the outside, Lullabee looks like an ordinary crib mattress. It is designed to contain all electronics deep within the mattress. Your baby just feels the support of a comfortable bed.

What material is the cover?

Lullabee's cover is made from comfortable, high-quality 100% polyester and proudly manufactured in the USA. We sell an optional 100% GOTS-certified organic cotton fitted crib sheet.

Shipping and Returns

Where do you ship?

At this time, Lullabee is only available to ship within the United States. We ship to Alaska and Hawaii. We do not ship to US territories.

What shipping methods do you offer?

We offer free standard shipping within the continental U.S. (excludes Alaska and Hawaii). Fedex and UPS are our main carriers.

You can expect to receive your mattress within 5-7 business days.

What is your return policy?

We offer a full, 30-day money-back guarantee on Lullabee. If you are not seeing success with Lullabee, reach out to our team (support@lullabee.com) and we can help.

Warranty

Is there a warranty period?

Yes, we offer a 6-month warranty on parts to the original purchaser. See our Warranty Policy for details.

HSA/FSA eligibility

Is Lullabee FSA/HSA eligible?

Yes, for most customers with an HSA/FSA account, Lullabee is eligible. We’ve partnered with Truemed to make the process simple. At checkout, just select Truemed as your payment method and follow the prompts to see if you qualify and complete your purchase.

How does it work?

It’s simple—just select "Truemed" as your payment method at checkout. You’ll then be guided to the Truemed platform, where you’ll complete a short health questionnaire. If you qualify, you can enter your HSA/FSA card details and complete your purchase directly through the platform.