The Black One-Piece Swimsuits from Sustainable Brands We Love

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Put away your quarantine sweats and get out your best SPF because summertime is upon us!


Now is the time to find your perfect Little Black Swimsuit for Hot Girl Summer 2021. Our collection of sustainable and classic black one-pieces range from simple & elegant to edgy & chic. The only things you’ll need to complete these looks are your go-to pair of sunnies and some sandy feet.

Sometimes everyone needs a bit of retail therapy, so if you’re going to make a fashion splurge, why not choose to buy ethically produced recycled fabrics! You may find a new brand that you fall in love with or rediscover a forgotten designer!

Dive into our picks for the best black one-piece swimsuits for the summer, 
all from eco-friendly brands. 

1. Bold Swim, Midnight Rise, $165 


Bold Swim offers the happy medium between one piece and cutouts. The medium coverage suit is ethically made in Brazil from Amni Soul Eco® fabric: a polyamide yarn that biodegrades in only five years when disposed of in landfills (versus the typical 50 years for general synthetics). Bold Swim has small curated collections released once a year and prides itself on its nontoxic and UV-protected garments. 

2. Reformation, Papaye Halter One-Piece, $128


There’s nothing better than a girly twist on a beloved classic, and the bow-tie halter neck on this chic black one-piece does just that. This garment saved 15.0 lbs. of carbon dioxide and 1.2 lbs. of waste and is sustainably made from 78% ECONYL® Regenerated Nylon, a nylon waste rescued from oceans and landfills. Reformation pieces are sustainably made in LA in small quantities to ensure low-waste production.

3. Vitamin A, Marylyn One-Piece, $198


We love a piece that can be worn in many ways! This strapless one-piece comes with a detachable belt and detachable straps to switch up your styling whenever you want. This choice has built-in bra support and can also be ordered in a full coverage cut. Vitamin A uses digital printing for most of our prints to reduce water use and textile waste. donate a portion of sales to ocean conservation organizations, plant-based fabrics

4. Ansea, The Reversible Tie Back One-Piece, $195

Sweet, simple, and stunning is always a great way to go when choosing your beachwear. This one-piece from Ansea brings a pop of white contrast to the perfectly sleek black suit. The suit can also be reversible to stark white: the best of both worlds! The female-dominated company aims to bring femininity and functionality to surfwear. With eco-friendly fabrics and water-conscious practices, Ansea shows how much they care about their clothing and the earth at the same time.

5. Galamaar, Oh Margot! One-Piece, ($276.00) Now $110.00


Who says a one-piece has to be full coverage? This unique design from Galamaar, gives the illusion of a bikini yet keeps the practicality of a one-piece. It includes an O-ring front, removable padding, and an adjustable back. Made from Italian fabric in LA, the 88% recycled Econyl garment is environmentally sound and passes our standards. 

6. Londre, The Ruffle Shoulder One-Piece, $142.00


If you’ve been searching for some timeless sleeves to spice up your swimwear, look no further. This flirty bathing suit comes in sizes XS-3X and has a backless feature, elastic ruffle straps, and a slim belt. Each Londre suit is ethically made with a minimum of  6 recycled plastic water bottles in Vancouver. Additionally, all water they make use of can be reused, and they only work with compostable packaging, 

7. Summersalt, The Sidestroke- Sea Urchin, $95


This suit is an iconic bestseller perfect for every poolside occasion. Rightfully praised on the Today show and in Elle magazine, this piece was named #1 most flattering one-shoulder style. Summersalt’s 78% recycled polyamide fabric and recycled packaging give even more reason to flaunt their beachwear. Sizing ranges from 0-24 and comes in a Long Torso option for our taller ladies. 

8. Wolven, Onyx Cage One Piece, $148


An edgy take on the classic black one-piece takes form in this suit from Wolven. The combo of a plunging neckline, all-over straps, and halter tie add a modern feel. Our favorite feature is that this piece is reversible to solid white, making it a two for the price of one deal. We love that this brand was founded on sustainability, diversity, body positivity, creativity, and carbon-neutral.

9. Natasha Tonic, Rebel, Black, $168.00


Natasha Tonic’s unique and versatile piece can be worn to the pool or on a night with jeans as a bodysuit. This effortlessly stylish swimsuit has an open back and slight white tie-dyeing. The natural hemp and antimicrobial material reduces microfiber pollution and is hand-dyed in Los Angeles.

10. Outerknown, Nomadic Volley Black, $68

These swim shorts are perfect for a beach-to-dinner look for anyone. Whether you’re surfing all day or need a comfortable pair of athletic-like shorts to throw on, this pair is perfect for the sustainable shopper. With 100% of their fibers being made with recycled or renewable fibers, Outerknown keeps its vow to keep our oceans as clean as possible. 

Love these options but want an even better option to minimize your carbon footprint by buying second-hand? Shop the abundance range of black one-piece choices on Thredup! Their curated pieces are in great condition, a fraction of the retail cost, and from amazing brands. The range of styles and sizes makes it the easiest way to thrift online and reduce textile waste! Get them before they’re gone!

Here are a few we found that we love.

Victoria’s Secret One-Piece Swimsuit, Size XS, $27.99


Nautica One-Piece Swimsuit, Size 6, $17.99

California Sunshine One-Piece Swimsuit, Size M, $26.99

Miss Capezio One-Piece Swimsuit, Size L, $38.99

ASOS One-Piece Swimsuit, Size 10, $19.99


Kona Sol One-Piece Swimsuit, Size 22 (Plus), $22.99



Updated, December 23, 2021

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