Penfield High Waist Thong Bikini Bottom

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.