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The Halter Onesie Black
ColorBlack
Size

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Free standard shipping on orders over $200 USD

SLEEK AND MINIMAL

A sculpting silhouette designed to flatter from every angle. The Halter Onesie features a clean halter neckline with an empire seam that defines the waist, paired with a sleek open back for a modern, confident look. A minimalist underbust strap offers secure support, while the capri-length leg with subtle flare elongates the body. Finished with an invisible scrunch for a lifted effect, and crafted from moisture-wicking recycled fabric for all-day wear.

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Customer Reviews

Overall rating: 5.0 / 5 from 36 reviews.

Customer photo review of The Halter Onesie / Black

This piece is sexy and it snatches my body just right ! Perfect for a Lagree class!

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

I love the quality and cut of the pieces. This was my first time buying from 437 and I can't wait to buy more of their fits! The one pieces fit perfectly and are cute as athleisure as well as practical for the gym and pilates. I already have my next cart filled!

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

Love how soft it is and how the material hugs you! I am 5’9, 150 lbs and I purchased a medium. Love it.

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

Unique onesie! Trendy and fun piece to own, fabric is high quality

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

I loved my onesie I wore it on my birthday the back is so cute !!!!!! I would continue wearing to to my reformer classes and yoga !!!!

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

Super comfortable fit! Material is great at absorbing sweat. Slight compression around waist to really snatch the waist! Got so many compliments!!

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

first time ordering from 437 and I was not let down. I get so many compliments every time I wear this. Perfect mix of sexy yet totally functional for pilates classes. I was worried the cream would show too much but the material is quite thick and compressing that I feel like it would make any body type look like a dream.

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

The fit is unreal! Such a versatile piece that can be worn out or for a workout! It’s so smooth and flattering. As a petite girl, the length is absolutely perfect. It’s slim-fitting and waist-snatching without feeling uncomfortable. I love it so much!

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

Love how comfortable it feels! :) I had to return xs and get a s and it fits like a glove

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

Wore this completely open back onesie to couples yoga and the girls stayed secure and that’s all I was worried about. Sometime halters hurt your neck, but I love this one, I got so many compliments wearing this. Love the capri. P.S. plz bring back swim

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

I could wear this everyday, so lightweight and flattering. Comes with padding which I always appreciate. Still compressive in the belly area and perfect cropped length to go with flip flops.

The Halter Onesie / Black

Customer photo review of The Halter Onesie / Black

I love everything I have bought here! One of my fav workout clothes brands 🖤🤍

The Halter Onesie / Black

Its so cute! it fits me well and the fabric quality is great, one of my new favorite pieces for sure!:)

The Halter Onesie / Black

Perfect for, very stretchy, and I got a lot of compliments! Will be purchasing more items!

The Halter Onesie / Black

Super cute onesie! I love that the capris flare it’s very flattering on the legs and glutes!!

The Halter Onesie / Black

The only thing I didn’t liked about it was the bust area was too small, I’m 34 c and the bust hold wasn’t great

The Halter Onesie / Black

I’m 5’8, so the S is just a hair too tight around my neck but otherwise this onesie is PERFECT. So soft, so good for low impact workouts. I love wearing mine to Pilates 🩷

The Halter Onesie / Black

The fabric is so buttery soft! I’m in love with every piece I’ve purchased.

The Halter Onesie / Black

The one piece fit like a glove! Very happy with my purchase.

The Halter Onesie / Black

Amazing quality! I had to return size xs for a s and it fits like a glove :)

The Halter Onesie / Black