🛒 1 FREE Exchange on Eligible US orders 📦 Limited Time Only: FREE SHIPPING on US Swim Orders!

  • Roxbury Plunge Neck Bikini Top | FINAL SALE
  • Roxbury Plunge Neck Bikini Top | FINAL SALE
  • Roxbury Plunge Neck Bikini Top | FINAL SALE
  • Roxbury Plunge Neck Bikini Top | FINAL SALE
  • Roxbury Plunge Neck Bikini Top | FINAL SALE
  • Roxbury Plunge Neck Bikini Top | FINAL SALE
  • Roxbury Plunge Neck Bikini Top | FINAL SALE

Roxbury Plunge Neck Bikini Top | FINAL SALE

4.5
Rated 4.5 out of 5 stars
22 Reviews
Regular price $39.85 Sale price $69.74
Unit price per
hi 👋 we're onewith - the most flattering swimwear! our swimwear is patent-pending, dig-free, elastic-free, and edgeless, just like your favorite no-show seamless undies.
🎂 FREE SHIPPING on all US Swimsuit Orders for a Limited Time Only ⏰ in celebration of our 3rd Birthday! 🎉
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Color:
this item is FINAL SALE! ➡️  When you purchase a final sale item, please keep in mind that returns/exchanges are not available, regardless of whether...
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size & fit info

Customers say this style runs true-to-size.

View our size chart here

shipping & returns

RETURNS

  • 1 free exchange for eligible US orders 🫶
  • 14-day returns available for a fee for eligible US orders 📦
  • items purchased at a discount of 30% or more are eligible for store credit only.
  • items marked final sale are always, you guessed it, final sale!
  • international orders are always final sale. see our full returns policy here.

SHIPPING

  • free standard shipping on US orders over $85 😍
  • priority + express shipping also available! 💨
  • international shipping available, rates and duties calculated at checkout ✈️
  • Shipping Protection, offered at checkout, is HIGHLY recommended! It covers lost, damaged, stolen, and stuck-in-transit packages 👍
product details
  • designed in USA, made in China
  • patent-pending
  • LATEX INFO: we cannot guarantee that the inner grip strip of our suits is entirely free of latex. If you have a latex sensitivity or allergy, we recommend exercising the same caution you would typically use when assessing whether to wear a product that may contain latex.
  • 80% nylon, 20% elastane
  • hand wash only, lay flat to dry
swimsuit care
  • Hand wash in cold water as soon as you can after use (rinsing in the shower is fine!)
  • DO NOT machine wash.
  • Lay flat to dry, do not hang.
  • Do not dry clean, iron, or machine dry (even on a delicate cycle...) as this can, and most likely will, damage your onewith.
  • Hot tubs and chlorinated pools with harsh chemicals can impact the quality and longevity of any swimwear, so it’s best to avoid them if you want to keep your swim in tip-top shape.
  • If you wear your onewith under normal clothes, keep in mind that friction can create pilling/snagging. We prefer to wear our onewith under beach cover-ups/sarongs, which are created to be worn with swim.
  • Sunless tanners, suntan lotions, oils, and harsh chemicals can ruin your onewith - ensure to not get these products in contact with any swim/garments!
  • ships from CT, USA
  • free shipping on US orders!
  • 14-day returns
  • 1 free exchange
as seen in

onewith you from the inside out ↔️

our swim has a soft inner grip strip to keep your suit secure...without tight seams.

free shipping on US orders
women-owned + WBENC-certified
size-inclusive (XXS - 4XL)
1 free courtesy exchange eligible on US orders

why choose onewith?

✨onewith ✨ vs. other swimwear

other swim brands
edgeless (no digging!)
no squeezing (elastic-free!)
no hidden seams inside
raw-cut (lays-flat on the body!)
inner grip inside to keep secure
made with 2 layers of fabric

☝️ frequently asked questions

the most commonly asked Qs about our swim that fits like undies ⬇️
  • please take our size quiz! it's the pink button that says 'CLICK HERE to find your size.' that is on every single product page on our site.

    you only need to take it once, and your best size will automatically display for each product on our site, depending on how that product runs.

    if you still want help in finding your size, reference our size guide here

    additionally, chat us on-site (quickest!) or DM us on IG and we can help you out.

  • We offer 1 free exchange on eligible US orders so that you can find your best onewith size.

    Returns are available for a $12.50 fee per order (additional fee will apply if you're returning more than 3 items).

    US orders purchased at a discount of 30% or more are eligible for return for store credit ONLY. no refunds or exchanges.

    International orders are ALWAYS final sale.

    You may return/exchange your eligible order within 14 days, the 14-day window begins the day of carrier-confirmed delivery. 

    Read more about the onewith Return Policy here.

    ⚠️ NOTE: ITEMS MARKED FINAL SALE + MYSTERY BUNDLES ARE ABSOLUTELY, POSITIVELY FINAL SALE. No returns, no exchanges, no exceptions. 

  • onewith = 2 layers of normal swimwear fabric, just like any other swimwear. people tend to think our swim is either 1 layer of fabric, and/or super thin, like no-show undies. that is not true! again, our swim has 2 layers of fabric. It's just bonded together, not sewn with tight seams, which gives it a sleeker appearance that people may read as "thin." While we can't guarantee our suits are frontal-wedgie-free, so-to-speak as every person's anatomy is different, we can say that there is no reason why our suits would cause 🐪toe more than any other swimwear.

  • yes, all of our bikini tops + one pieces have removable bust cups that you can leave in, or take out!

  • we get it, the itch to get your swim that doesn't dig in ASAP is real! luckily, we do offer an Express shipping option if you do need it ASAP. otherwise, we offer free standard shipping on US orders over $85. all orders with standard shipping ship from our Connecticut, USA warehouse within 2-5 business days of receiving your order.

  • ALL onewith suits feature our inner grip strip, which keeps the suits secure without the use of tight seams or elastic that digs. the inner grip strip is super soft and flexible.

4.5
Rated 4.5 out of 5 stars
Based on 22 reviews
Total 5 star reviews: 15 Total 4 star reviews: 4 Total 3 star reviews: 1 Total 2 star reviews: 2 Total 1 star reviews: 0
86%would recommend these products
Overall FitRated 0.0 on a scale of minus 2 to 2
22 reviews
  • KA
    Katy A.
    Verified Buyer
    Roxbury Plunge Neck Bikini Top | FINAL SALE
    Reviewing
    Roxbury Plunge Neck Bikini Top | FINAL SALE
    I recommend this product
    What is your typical bra size? 34D
    What size did you purchase? S
    Rated 5 out of 5 stars
    1 week ago
    Wish this was invented 40 years ago

    After having two children and age doing what it does, my body has changed. Normally swimsuits ride up in the back which I hate. But with OneWith not only does the bottom seat in place, it fits perfectly! The top has silicone along the cup which keeps the suit in place on the girls. This will be the only brand I buy here on out

    Overall FitRated 0.0 on a scale of minus 2 to 2
    O Profile picture for onewith
    onewith
    4 minutes ago

    Thank you so much for your glowing review, Katy! We're so glad to hear you love the stay-put power of the inner grip strip, and that the Roxbury provides the perfect fit! We can't wait to have you back soon 🫶 Thank you so much for your support!

  • TC
    Theresa C.
    Verified Buyer
    Roxbury Plunge Neck Bikini Top | FINAL SALE
    Reviewing
    Roxbury Plunge Neck Bikini Top | FINAL SALE
    I recommend this product
    What is your typical bra size? 34D
    What size did you purchase? S
    Rated 5 out of 5 stars
    3 weeks ago
    Perfect

    This is by far a favorite! Excellent coverage for a larger cup size (D-DD) and the plunge neckline is so flattering! Would buy in every color! Please keep this one around (and bring back the Lasata bottom!! Killer combo!)

    Overall FitRated 0.0 on a scale of minus 2 to 2
    O Profile picture for onewith
    onewith
    11 minutes ago

    Thank you so much for your kind review, Theresa! We're so glad you love the coverage and support of Roxbury! Props to you for remembering our Lasata bottom - that was one of our faves too :) Enjoy your flattering bikini top that fits like undies!

  • RL
    Rachel L.
    Verified Buyer
    Roxbury Plunge Neck Bikini Top | FINAL SALE
    Reviewing
    Roxbury Plunge Neck Bikini Top | FINAL SALE
    I recommend this product
    What size did you purchase? S
    Rated 5 out of 5 stars
    4 months ago
    love it

    i always struggle to find good bikini tops bc i’m small chested but this one is perfect

    Overall FitRated 0.0 on a scale of minus 2 to 2
    O Profile picture for onewith
    onewith
    3 months ago

    Thank you so much for this review, Rachel We're so glad you found us! The Roxbury is a universally flattering bikini top, and we're thrilled to hear how much you enjoy it :)

  • CF
    Caroline F.
    Verified Buyer
    Roxbury Plunge Neck Bikini Top | FINAL SALE
    Reviewing
    Roxbury Plunge Neck Bikini Top | FINAL SALE
    I recommend this product
    Rated 5 out of 5 stars
    7 months ago
    Cute and good coverage

    Good coverage. Shows enough to be sexy but not too much . I move got a small frame and large chest. Size small fit great

    O Profile picture for onewith
    onewith
    6 months ago

    Hi Caroline, thank you so much for this review! So happy to hear you love your Roxbury. It's one of our favorite tops, and it's super supportive for those who have smaller band + larger cup sizes. Enjoy your onewith 🧡

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