The 4-in-1 gym g-string that solves every gym girl problem
Outie Athletic G-String
Outie Athletic G-String
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Size Chart
Size Chart
Fit notes:
Outie G-strings fit true to size and are proportionally graded - not just at the waistband, but through the gusset, so each size fits the body it’s actually made for.
However if you are purchasing colours Candy Pink and Caramel Nude I recommend sizing up due to the fabric.
Fit notes:
Outie G-strings fit true to size and are proportionally graded - not just at the waistband, but through the gusset, so each size fits the body it’s actually made for.
Unlike traditional underwear that uses the same gusset across sizes, our designs are proportionally graded for a consistent fit experience.


Shipping
Shipping
The Bikini Biz provides both Standard and Express postage with Australia Post. Same day dispatch on all orders placed before 1PM weekdays.
Not in Australia? With International shipping available we've got you covered.
Once your order is dispatched you will receive an email with your tracking number.
Care Instructions
Care Instructions
For a long and fabulous life, I prefer a gentle hand wash to keep my shape just right.
But if you're in a rush, I can handle the machine... just be sweet about it.

Returns & Exchange Policy
Returns & Exchange Policy
Return & Exchange Policy
Due to hygiene reasons, we do not accept returns or exchanges for change of mind. Please ensure you select the correct size before purchasing.
We recommend trying your garment on over your own clothing to check fit and comfort.
Returns will only be accepted if the item is deemed faulty. In such cases, please contact us with details and images of the issue within 7 days of receiving your order. Returns sent outside of this timeframe will be denied.
Original shipping fees are non-refundable and not included in store credit.
RETURN ADDRESS:
The Bikini Biz
PO Box 82 Brighton VIC 3186
Include a note with your full name and order number and nature of the return.
🐪 Zero camel toe
💦 Sweat + leak resistant
💋 Snatched seamless fit
✨ No digging in - no muffin top
Meet the Outie Athletic G-String!🐱💦 The 4-in-1 gym g-string every active girl’s been replacing their underwear drawer with.
Because honestly? Every single gym-girl problem...the camel toe, the sweat patches, the chaffing, panty lines, the digging waistband, the discharge, the MUFFIN TOP! I’ve brought them all into one solution because your body was never the problem.
Made for movement: A design that combines comfort and functionality making it a staple for the active queen or anyone who's simply sick of picking underwear from out of their crotch that wasn't made for them.
4-in-1 Functions
- No camel toe or labia lines - Keep your vulva tucked in with our built-in shield for a clean and confident look
- Leak resistant lining - Holds everyday discharge, sweat and light spotting - no back up pads or liners needed.
- Seamless & Sculpting Fit - No VPL (visible panty lines) just a smooth finish under any outfit
- No Chaffing, No Digging - Our wider, higher gusset is intentionally shaped to actually cover and support your vulva. No more tugging or discomfort
Designed with you in mind
Confidence in the gym: No more camel toe on the hack squat, no coochie sweat on the bench, no awkward mid-set adjustments. The built-in shield’s got your bits covered.
Performance fabrics that deliver: Thin, breathable, antibacterial, and moisture-wicking with a soft bamboo cotton gusset that keeps your vulva healthy, happy, and fresh.
Real Talk? - “I’ve spent years in the gym feeling uncomfortable, self-conscious, and frustrated by underwear that clearly wasn’t made for women who move. I took every problem I’ve ever had in the gym and built one solution. It took months of testing, tears, late nights, and trial runs, but seeing you girls love it already makes it all worth it. From the bottom of my heart, I hope you love the Outie Athletic G-String as much as I do.”
- Alysha 💖

Sizing guide
⭐️⭐️⭐️⭐️⭐️
The Bikini Biz is honestly amazing! Alysha is so kind, genuine, and really goes above and beyond for her customers. The quality is next level and delivery was super quick! I’ve never had anything like these G-strings for the gym they’re so comfy, flattering, and the fit is perfect. No more camel toe, no riding up, just pure confidence! The products truly speak for themselves, and I honestly wouldn’t shop anywhere else now!
The best investment EVER, you actually can't even compare
im actually like so wowed by these. i was like yea i need new undies and sometimes it can be so annoying when bits stick out or dig in on the wrong places but these genuinely are so perfect i cant.
when choosing your gym fit yoh don’t think too much about what people dont see, but these really make you feel so comfortable and its that little treat to yourself because you do deserve the best. id wear these just by themselves to be honest
These g strings are next level! I have never worn anything like it so comfy yet hold in place throughout my whole workout and day! Doesn’t rip you in half and is so soft doesn’t feel like your wearing anything but keeps you comfortable through workouts, and day to things! I will be stocking up!!
Okay 🙏 Here. We. go 👏
Your athletic gee is the bomb digity.
I did a full work out in them at the gym today. THE UNDERWEAR DID NOT MOVE!!!
Kettlebell swings, burpees, floor face pulls... what do you mean I didn't have to go to the bathroom to adjust my underwear??
I even checked the bench after incline chest press and absolutely no sweat mark left on the seat.
Are you freaking kidding me???
And the best part of all... My biggest fear was wrong.
I thought for sure, these would still choke my lower half... that surely big booty girls cannot have it all either and I would have to dig the outie out of my butt as well.
WRONG. Absolutely not!
They are so comfortable I actually forgot several times I was even wearing them! 😍😍
You've done it. You've actually done it!!
You're made a gym gee thats even suitable and comfortable for the big booty bitches 😍😭
For context, my glutes Measures for a size 16 in clothing, but my hips measure for a size 12-14. I wear a size large in the outie. Nil issues with the Outie Gee getting lost between my glute cheeks. It stayed put and didnt slip at all!
My new fav underwear ✔️
IS YOUR VAG EATING YOUR UNDIES? 👀
Finally, underwear made for real vulvas that don’t “tuck in.”No more bulky pads, no liners, just seamless comfort.
I get gym girl problems because I AM a gym girl.
I didn’t invent the G-string. I just perfected the gym version. I solved the part that the other brands missed.
⭐️⭐️⭐️⭐️⭐️
The Bikini Biz is honestly amazing! Alysha is so kind, genuine, and really goes above and beyond for her customers. The quality is next level and delivery was super quick! I’ve never had anything like these G-strings for the gym they’re so comfy, flattering, and the fit is perfect. No more camel toe, no riding up, just pure confidence! The products truly speak for themselves, and I honestly wouldn’t shop anywhere else now!
The best investment EVER, you actually can't even compare
im actually like so wowed by these. i was like yea i need new undies and sometimes it can be so annoying when bits stick out or dig in on the wrong places but these genuinely are so perfect i cant.
when choosing your gym fit yoh don’t think too much about what people dont see, but these really make you feel so comfortable and its that little treat to yourself because you do deserve the best. id wear these just by themselves to be honest
These g strings are next level! I have never worn anything like it so comfy yet hold in place throughout my whole workout and day! Doesn’t rip you in half and is so soft doesn’t feel like your wearing anything but keeps you comfortable through workouts, and day to things! I will be stocking up!!
Okay 🙏 Here. We. go 👏
Your athletic gee is the bomb digity.
I did a full work out in them at the gym today. THE UNDERWEAR DID NOT MOVE!!!
Kettlebell swings, burpees, floor face pulls... what do you mean I didn't have to go to the bathroom to adjust my underwear??
I even checked the bench after incline chest press and absolutely no sweat mark left on the seat.
Are you freaking kidding me???
And the best part of all... My biggest fear was wrong.
I thought for sure, these would still choke my lower half... that surely big booty girls cannot have it all either and I would have to dig the outie out of my butt as well.
WRONG. Absolutely not!
They are so comfortable I actually forgot several times I was even wearing them! 😍😍
You've done it. You've actually done it!!
You're made a gym gee thats even suitable and comfortable for the big booty bitches 😍😭
For context, my glutes Measures for a size 16 in clothing, but my hips measure for a size 12-14. I wear a size large in the outie. Nil issues with the Outie Gee getting lost between my glute cheeks. It stayed put and didnt slip at all!
My new fav underwear ✔️