The Secret to our Swimsuits That Stay Put: The Inner Grip Strip

The inner grip strip is a soft, flexible lining built into every opening of our swim that fits like underwear. It helps keep your swimsuit securely in place, without digging in (and, of course, without the use of tight seams or elastic!).

At onewith, we designed the inner grip strip to prevent your beyond seamless swimsuit from slipping, rolling, or riding up, so your swim feels smooth, comfortable, and stays put in and out of the water.

Unlike traditional swimwear that relies on tight elastic bands or bulky seams, our inner grip strip provides gentle hold with an edgeless, second-skin fit. It’s made for movement! Whether you’re swimming, laying out, playing beach games, or walking along the shore, our swim that fits like undies will move with you. 

It’s not sticky, just secure!

Our inner grip strip isn’t adhesive or tacky. It’s designed to feel soft and secure, giving you a totally comfy swimsuit fit without the squeeze of elastic.

Why you need to stretch your onewith swimsuit

Because our swimsuits are elastic-free, edgeless, and raw-cut, you’ll need to “warm up” the inner grip strip before each wear.

A quick stretch helps the edgeless swimsuit mold to your body and creates that dig-free, flattering, second-skin swim feel!

Because of the inner grip strip, we’re able to achieve an edgeless swimsuit fit that stays in place without traditional seams or elastic that can cut into the skin.

While the exact feel can be subjective from person to person, stretching as directed makes a huge difference in overall comfort, fit, and wearability.

How to stretch your swim that fits like no-show undies (30 seconds!)

To get the best fit for your comfortable swimsuit:

1. Stretch each garment opening gently before putting it on

2. Once the swimsuit is on your body, continue stretching until you achieve that smooth, no-show underwear look

3. That’s it! All it takes is 30 seconds

This step is mission-critical for a flattering swimsuit that stays in place and feels dig-free.

If you’re a visual learner, we made a quick stretch demo you can follow anytime! Plus, a reminder is printed on every onewith tag, and your order includes a QR code linking directly to the demo.

A few fit notes about our swim that fits like no-show underwear

• Our suits are inspired by no-show underwear, but they won’t feel identical. the inner grip strip and bonding create a more secure structure that's crafted to stay put in the water.

• Stretching is absolutely essential to achieving a second-skin swimsuit fit, and it’s often the most overlooked step! 

• If your suit feels too small at first, be sure you’ve given it a proper stretch before deciding on a size swap or return.

And don’t worry: you'll only need to stretch your beyond seamless swimsuit each time you put it on, not while wearing it throughout the day.

What Is the Inner Grip Strip Made Of?

onewith cannot guarantee that the inner grip strip does not contain trace amounts of latex. If you have a latex or adhesive sensitivity or allergy, we recommend exercising the same caution you would with any product that may contain latex or similar materials. 

The Bottom Line

The inner grip strip is the beloved feature that makes our swimsuits feel secure, smooth, and dig-free, so you can stop adjusting your suit and start feeling your best in and out of the water! To shop our game-changing dig-free swim, visit our collection of size-inclusive swimwear here. As always, be sure to follow us on Instagram for all updates in the world of better-than-seamless swim!