The Flare Onesie Black

The Flare Onesie Black

$115
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The Flare Onesie Black
  • The Flare Onesie Black
  • The Flare Onesie Black
  • The Flare Onesie Black
  • The Flare Onesie Black
  • The Flare Onesie Black
  • The Flare Onesie Black
  • The Flare Onesie Black
  • The Flare Onesie Black
The Flare Onesie Black

The Flare Onesie Black
$115
Size

Size Guide

Size XS S M L XL
US/CA 0-2 2-4 6-8 10-12 14-16
UK/AU 2-4 6-8 10-12 14-16 18-20
EU 30-32 32-34 36-38 40-42 44-46
Bust (in) 31-33 34-35 36-37 38-40 41-43
Bust (cm) - - - - -
Underbust (in) 26-28 28-30 30-32 32-34 34-36
Underbust (cm) - - - - -
Waist (in) 23-25 26-27 28-29 30-32 33-35
Waist (cm) - - - - -
Hip (in) 33-35 36-38 39-40 41-43 44-46
Hip (cm) - - - - -

How to measure

4 interest-free payments with Sezzle

Free standard shipping on orders over $200 USD

EFFORTLESSLY STREAMLINED

The one-piece made to flatter every curve. Designed with a straight neckline, scooped back, and princess seams that sculpt your waist. The flared leg elongates your frame while adjustable thick straps and removable padding allow for a custom fit. Made with 437 cloud™ technology; effortless, elevated, and endlessly wearable.

Details

Pair with matching Ballet Wrap or Curve Jacket

Features

  • Sleek, full length, flare leg onesie with removable padding
  • Flattering seams cinch at the waist for hourglass silhouette emphasis
  • Straight neckline and scooped back with adjustable thick straps
  • White 437 logo on front centre
  • 33"" inseam
  • 437 cloud™ moisture wicking single layer fabric
  • Sustainably produced, made of recycled polyester

Care & Fit

Size & Fit

  • True to size
  • 33”inseam
  • Model is wearing size XS - Bust 35" (89cm), Waist 25" (64cm), Hips 35" (89cm), Height 5'5 (165cm) 

Materials & Care

  • 82% Recycled Polyester, 18% Spandex
  • Care: Machine wash cold. Dry flat, do not iron

Due to the nature of our performance fabrics and finishes, please allow for slight variations in stretch, softness, color, and texture. These characteristics are inherent to the fabric and finishing process and are not considered defects.

Made with thoughtfully selected materials, tested to meet strict limits for regulated PFAS compounds, including PFOA and PFOS

Sustainability

437 cloud™ Fabric

  • Made from mills recycled post industrial fabric waste
  • Moisture wicking - pulls sweat to outer layer quickly

Factory

  • Traceable yarn source, Oeko-Tex certified
  • Lower carbon emissions during dye process
  • Lower water ratio dyeing machine 
  • Finishing machines are powered by natural gas instead of coal

Shipping & Returns

We offer free shipping on all orders over $200 USD. Please see Shipping and Delivery page for the delivery time to your location.

Express shipping is temporarily unavailable for international orders—thanks for your patience as some deliveries may take a little longer due to global carrier delays.


437 is not responsible for any import duties, broker fees, customs and taxed incurred on shipments, as these are the responsibility of the purchaser. We cannot advise the cost as these charges will vary according to country. As these fees are not computed no applied by 437. If you are unsure about the charges please contact your local customs office for further information.


Please note that orders over $500 USD will require a signature upon delivery to ensure your package arrives safely and securely. Missing orders over $500USD may be required to fill out a police report.


Orders will be packed within 3-5 days of purchasing. Shipping time is dependent on location. We accept all regular priced merchandise within 30 days of the order being placed for a refund on your original form of payment or store credit via gift card. If a refund is selected, a $15 USD restock fee will be deducted from your return amount. If a store credit is selected, your gift card will be issued for the full value of your returned suits in USD and will not expire. Discounts of 25% or more are considered final sale. Please see our return policy for more details.

Paired with

Make it a set

The Bare Onesie Black

The Bare Onesie Black

The Bare Onesie Black
$115

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Customer Reviews

Overall rating: 5.0 / 5 from 19 reviews.

Customer photo review of The Flare Onesie / Black

Obsessed is an understatement. This 437 onesie fits like it was made for me! snatches in all the right places and feels sooo comfortable 🤍

Alejandra B. 5/5 Verified

The Flare Onesie / Black

Customer photo review of The Flare Onesie / Black

Love this onesie! It’s a bit long on me (I’m 5’4”) but I’ll get it tailored

Pamela G. 5/5 Verified

The Flare Onesie / Black

Customer video review of The Flare Onesie / Black

I had a great experience with this company and definitely plan to keep ordering from them. The clothes are amazing—super buttery soft, perfect for workouts, and true to size, which is always a big plus. I did have a small issue with a stain on one pair of shorts, but their customer service was excellent. They responded quickly and sent out a replacement right away with no hassle at all. Overall, really impressed with both the quality of the clothing and how well they take care of their customers. Highly recommend!

Gabriela C. 5/5 Verified

The Flare Onesie / Black

Customer photo review of The Flare Onesie / Black

Obsessed with this! I will say that I am 5”5 and I purchased a medium. The only thing is that I did cut the bottoms because they were too long for me.

Victoria K. 5/5 Verified

The Flare Onesie / Black

Customer video review of The Flare Onesie / Black

I have a longer torso so I don’t typically gravitate towards onesies, but I’m so happy I did for this one! It is my new go to, so flattering and comfortable and matches with any wrap top!

Alyssa P. 5/5 Verified

The Flare Onesie / Black

Customer photo review of The Flare Onesie Black

I’m obsessed with this bodysuits 437 has become my favorite outfits 🤩

Maribel C. 5/5 Verified

The Flare Onesie Black

Customer photo review of The Flare Onesie / Black

LOVR ABSOLUTELY LOVE . Been wearing to solidcore since I got it. You can adjust the straps which is perfect for me! Such a quick easy outfit that still looks stunning.

Mariah O. 5/5 Verified

The Flare Onesie / Black

Customer photo review of The Flare Onesie Black

This really is a flattering onesie! It looks incredible on and is the perfect length for me at 5’4”. I will say, women with medium-larger bust sizes absolutely have to size up. Also, this may run a touch small. I’m typically an XS, 34C and got a small. It fits just right. However with my bust size I could have had a little more coverage with a medium - I absolutely cannot work out in this (because of my chest) without sizing up to a medium. Worth every penny so far. Love this!

Crista S. 5/5 Verified

The Flare Onesie Black

Customer photo review of The Flare Onesie / Black

I absolutely love this set!!! The fabric is amazing and I will definitely be purchasing soon!! Thank you again🤍

Karson B. 5/5 Verified

The Flare Onesie / Black

Love this onesie! I have a few onesie's from 437 and all are super flattering

Lauralynn P. 5/5 Verified

The Flare Onesie / Black

Love these!!! Omg please please please drop other colors in this style!

Saloumeh Z. 5/5

The Flare Onesie / Black

Adorable. I am 5’5 and was scared the xs was not going to be long enough but it fits perfect

Cassidy 5/5 Verified

The Flare Onesie / Black