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

Tweak CORE seamless everyday underwear in Onyx black

Tweak CORE seamless everyday underwear in Bare nude

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 visible panty lines — VPL-free guarantee

✓ Waistband stays put — no rolling, no adjusting

✓ Breathable premium fabric, all day and all workout

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 brief for everyday confidence — sleek, invisible and ultra-comfortable, with premium construction that disappears under activewear and everything else.

Features:

Seamless design — no visible lines
Bonded, seam-light edges that disappear under leggings
Ultra-soft microfibre with four-way stretch
Breathable, premium all-fabric construction
Soft gusset lining for all-day comfort
Streamlined athletic cut for maximum freedom of movement

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

Australia: Flat rate shipping of AUD $10, free on all orders over $100. Orders are dispatched within 1–2 business days and typically arrive within 3–5 business days.

International: Shipping costs are calculated at checkout based on your location, with delivery usually taking 7–14 business days. International orders may be subject to customs duties and taxes, which are the customer’s responsibility.

You’ll receive a tracking number by email as soon as your order ships. Full details are available in our Shipping Policy.

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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 throughout the day not just during workouts. The gusset has a soft lining, keeping your most sensitive area gentle and comfortable from morning to midnight.

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

Backed by our VPL-Free Guarantee

Best Value

The Core Duo

$53.98

Shop Now

Let customers speak for us

from 253 reviews

Karina Benseman

02/23/2026

Love these G’s

Love these G’s, no other comes close to the performance ie comfort, fabric feel, colours delivery times to NZ are fast!!

Perform- Onyx

Anonymous

12/09/2025

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.

PERFORM Seamless No-VPL Performance Activewear Red

Theo

07/27/2025

Like finding gold

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

Warm Up - Bare

Phoebe

07/26/2025

Gym approved

Completes my gym bag

Ultra Classic

Anouk

07/25/2025

Legg day y approved

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

Aqua Pops

Hazel

07/25/2025

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

Ultra Classic

Evie

07/25/2025

Invisable

Classic look and feel like you have nothing on.

Black Classic

Asher

07/22/2025

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

After Dark

Esme

07/21/2025

Great selection

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

Bare Bundle

Cleo

07/20/2025

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* +++

Warm Up - Black

Kaia

07/20/2025

Tweak, keep them coming

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

The Perform

Atlas

07/19/2025

Great colours amazing fit

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

Aqua Pops

Lyla

07/18/2025

Tweak, keep them coming

already ordered more

Booty Shaker

Noa

07/18/2025

YES

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

Aqua Pops

Grace

07/17/2025

The Combo

Perfect mix of fit and fabric.

The Combo

CORE Seamless Everyday Underwear

Not every day is a training day

Upgrade Your Core Experience

The Core Duo

Let customers speak for us