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

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
Bamboo-lined gusset 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 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

The Core Duo

$59.98

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 Underwear Red