Name: CORE Seamless Everyday Bamboo Underwear
Brand: Tweak me Online
SKU: COBA-XS
Price: 29.99 AUD
Availability: InStock

Tweak Me Online Core Onyx seamless bamboo underwear black

Tweak Me Online Core Bare seamless bamboo underwear natural tone

4.96 ⭐ from 253 reviews

$29.99

Tax included. Shipping calculated at checkout.

Color — Bare

Bare

Onyx

Quantity

In stock, ready to ship
Backordered, shipping soon

No VPL, no slip! if you nail your size. Check the Tweak G-string size chart and lock in your best fit.

Get your size HERE

The Everyday Heavy Hitter

Core is your go-to seamless underwear designed for everyday confidence. Sleek, invisible, and ultra-comfortable with premium construction that disappears under anything.

Features:

Seamless design - no visible panty lines (VPL)
Bonded, seam-light edges that disappear
Ultra-soft microfibre with four-way stretch
Breathable, premium all-fabric construction
Bamboo-lined gusset for comfort
Minimal coverage, maximum confidence

Available in Onyx (black) and Bare (nude).

Use collapsible tabs for more detailed information that will help customers make a purchasing decision.

Ex: Shipping and return policies, size guides, and other common questions.

Let customers speak for us

from 253 reviews

My wife's new favorite underwear for workouts

I purchased a pair for my wife to try before purchasing multiple pairs.

She says these are her new favorite for working out and runs. The construction is top notch. She says they are very comfortable and better than most g-strings and athletic underwear she has tried. We are both underwear aficionados, and we recognize that the quality exceeds other premier athleisure underwear brands. We will definitely be purchasing more. They truly are seamless and comfortable. No VPL whatsoever.

Anonymous

12/09/2025

Red Seamless G-String

Like finding gold

Where have you been, been looking for the perfect G for an outfit and these are perfect

Theo

07/27/2025

Warm Up - Nude

Gym approved

Completes my gym bag

Phoebe

07/26/2025

Ultra Classic

Legg day y approved

Love these,Look and feel amazing super comfy and stay put even during leg workouts

Anouk

07/25/2025

Aqua Pops

Love the fit, they just hug the body yet still can adjust the waistband for different outfits and looks

Hazel

07/25/2025

Ultra Classic

Invisable

Classic look and feel like you have nothing on.

Evie

07/25/2025

Black Classic

love

YAY gym bag complete, these are just what I was looking for and they stay where I put them even during a HIT workout

Asher

07/22/2025

After Dark

Great selection

Honestly didn't expect them to be this breathable and light. Perfect for long gym days.

Esme

07/21/2025

Bare Bundle

Best

Had to try them and so glad I did they are better than expected, they fit great, feel amazing and do the job 5* +++

Cleo

07/20/2025

Warm Up - Black

Tweak, keep them coming

I have already ordered more, they are great for any occasion

Kaia

07/20/2025

The Perform

Great colours amazing fit

Love the colour range and how smooth they feel. I've already ordered more.

Atlas

07/19/2025

Aqua Pops

Tweak, keep them coming

already ordered more

Lyla

07/18/2025

Booty Shaker

YES

Just want I have been looking for, feel great and look amazing

Noa

07/18/2025

Aqua Pops

The Combo

Perfect mix of fit and fabric.

Grace

07/17/2025

The Combo

Love this collection

I have been using just Tweak for 2 years now

Brontë

07/17/2025

Booty Shaker

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Not every day is a training day

But every day deserves underwear that performs.

The Core Collection is Tweak's everyday essential, the same seamless, no-VPL construction as our performance styles, dialled back for all-day wear. The body is Coolon, so sweat and heat move away from your skin naturally throughout the day not just during workouts. The gusset is bamboo, keeping your most sensitive area naturally soft, antibacterial, and comfortable from morning to midnight.

Same dual-fabric engineering. Same invisibility. Different pace.

Backed by our VPL-Free Guarantee

Best Value

Tweak Me Online Core Duo bundle Onyx and Bare seamless underwear, Coolon body with bamboo gusset

The Core Duo

$59.98

Shop Now

Ships in 24–48h

Easy exchanges

Discreet packaging

Free shipping over $100 AUS

Get 15% off your first order

CORE Seamless Everyday Bamboo Underwear

Let customers speak for us

Not every day is a training day

Upgrade Your Core Experience

The Core Duo