• Baby wearing a blue bamboo romper with baseball pattern
  • Child wearing a blue bamboo convertible romper with baseball pattern holding a small ball on a white background
  • Baby wearing a blue bamboo convertible romper with baseball pattern on a white background
  • Two babies wearing coordinating bamboo pajamas with baseballs on a white background
  • Baby wearing a blue convertible romper with white baseball patterns on a white background
  • Baby wearing a blue bamboo romper with a baseball pattern, crawling on a white surface.
  • Baby wearing a blue bamboo romper with baseball patterns on a white background
1 7

Grand Slam Convertible Romper

Grand Slam Convertible Romper

$35.00
$35.00
Sale Sold out
Shipping calculated at checkout.

Hurry, only 1 left in stock

Size: PREEMIE
  • Parent-Approved
  • Comfort Guaranteed
  • Order Tracking
  • Easy Returns

Why choose between a romper and a footie when you can have both? This 2-in-1 essential features our signature fold-over foot cuffs, allowing you to easily transition from an open-toe romper for playtime to a cozy footie for sleep. Crafted from our buttery-soft bamboo viscose blend, it is naturally breathable and temperature-regulating—keeping your little one cool during active play and warm during rest.

WHY YOU’LL LOVE IT:

  • 2-in-1 Versatility: The convertible foot cuffs offer flexibility for changing temperatures or a growing baby, making it a staple for both day and night.
  • Effortless Changes: A functional 2-way zipper allows for quick diaper changes without having to fully undress your little one.
  • Premium Bamboo Fabric: Naturally hypoallergenic and moisture-wicking, our signature blend is the safest and softest choice for sensitive or eczema-prone skin.
  • Sporty Aesthetic: The timeless baseball print on a soft blue background makes it a perfect choice for game days or everyday wear.

MATERIAL & FEATURES:

  • 95% viscose from bamboo, 5% spandex
  • Functional 2-way zipper for seamless access from top or bottom
  • Convertible foot cuffs (easily switches from romper to footie)
  • Fold-over hand mitts on sizes NB and 0-3M to prevent scratches
  • Tagless for a smooth, irritation-free fit
  • Free from harsh chemicals and flame retardants

SIZING & FIT:

  • True to size with a flexible, stretchy fit.
  • Designed with added length to ensure extended wear as your baby grows.
  • Please refer to our size chart for detailed measurements.

WASH & CARE INSTRUCTIONS:

  • Machine wash cold with mild detergent (avoid Dreft)
  • Wash inside-out and fully zipped with like colors and other bamboo items
  • Avoid the delicate cycle to prevent the fabric from sitting in water longer than necessary
  • Tumble dry low, or lay flat/hang to dry
  • Do not bleach or use optical brighteners
  • Use color catcher sheets to keep the blue base and baseball print looking crisp
View full details

Why do we love bamboo?

  • Gentle on Sensitive Skin

    Ultra-soft bamboo that’s perfect for eczema-prone littles.

  • Cool + Breathable

    Naturally temperature regulating (up to 3° cooler than cotton) for better sleep.

  • Grows With Them

    Signature stretch = up to 3x longer wear.

  • More Sustainable

    Uses less water than traditional cotton.

  • 5 stars: 67 (96%)
  • 4 stars: 1 (1%)
  • 3 stars: 2 (3%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
c
christina
18-24M
The most vibrant blue!

We love this print on our youngest babe. The colors are so bright, and it just feels so fun!

christina review photo christina review photo
A
Allison
we loved this sleeper so much we bought it in 3

we loved this sleeper so much we bought it in 3 sizes. 🩷

Allison review photo
A
Ashley
3-6M
OBSESSED!!!

I love this color so much! I also have it in a 2 piece set. So adorable!!!

Ashley review photo
H
Heather
3-6M
Love

Love everything from birdie bean! Sizing is always correct and everything is so soft!

A
Arielle
3-6M
SUCH A CUTE ROMPER!

We are in love with this romper! So soft and perfect for summer time!

A
Arielle
3-6M
SO CUTE!

Absolutely love this romper! So soft and my baby looks adorable in it!

A
Arielle
3-6M
ADORABLE

So soft and adorable! Just as pictured.

A
Anonymous
0-3M
Perfect gift

The most perfect gift. Fits great. Soft ribbed material. Pattern is beautiful!

C
Cyndi
12-18M
Cute romper

The romper is adorable, but the one in the picture had ruffles on the butt, and the one I received in the mail does not have ruffles on the butt. That was very disappointing especially for the price.

A
ALLEN
0-3M
Pink camo

I’m giving as a gift! Love the fabric. So soft. It’s a baby present for a new dad who loves to hunt.

E
Elli
18-24M
The cutest!

Everything I’ve ordered from BB has been amazing. This print was totally us and I even cuter in person! Hopefully the MAMA sweatshirt comes back in stock!

C
CathyShields
0-3M
Adorable! Always incredibly soft and the prints

Adorable! Always incredibly soft and the prints are always amazing!

A
Anonymous
18-24M
Strawberry shortcake ruffle convertible romper

So adorable!! Comfy and cute, very well made!

K
Kristina
The most obsessed with this print !

The most obsessed with this print !! Got rainbows skies for my girls to sibling match too 💕

R
Ruby
2T
Perfect!!!!

Perfect for the holiday festivities!! I love the feel of the material and the thickness as well!! Will definitely be ordering more soon!!

A
Amy
0-3M
So soft and the quality is

So soft and the quality is great

M
Melanie
NEWBORN
Patriotic Preemie

We are ready to celebrate with this patriotic romper- soft, comfy, light weight - perfect for fireworks at night

H
Heather
NEWBORN
Love

Love it! So soft with bright colors for my granddaughter to wear for her weekend at the lake!

A
Arielle
3-6M
Amazing!

So cute and soft just as expected!

A
Alysa
0-3M
SO cute and SO soft

Top quality as usual!!!

K
Kaitlyn
2T
Beautiful Print

This print is great! We live on a lake and go fishing almost every weekend. I got the pink print for my daughters and h the e white for my son. All equally vibrant in color. And they love matching!

T
Taylor
18-24M
Are we kidding - this is the cutest thing

This is the most beautiful & sweetest onesie I’ve ever seen!!!! Bamboo which makes it top notch, the ruffles are adorable & the design is so so cute. I want it in every size for my girl!

A
Anna
2T

Pastel PEEPS™ Ruffle Convertible Romper

M
Makiha
PREEMIE

Bubblegum Check Ruffle Convertible Romper

A
Anna
2T

PEEPS® & Petals Ruffle Convertible Romper

N
Nicole
12-18M
Adorable Easter Outfits

Absolutely loved

S
Sofia
2T
The cutest!

Couldn’t be happier! Soft, vibrant, adorable.

K
Kayton

I am so obsessed, it is so soft! Went straight in the hospital bag!

M
Melanie

Perfect adorable pajamas for Easter! I love the softness of the bamboo. They’re a great purchase!

You May Also Like