Black
Black
Black
Black
Women's Underwear >

BioTracker Boyleg Brief

$36.00

Any 4 undies or socks for 5% off.
Any 8 undies or socks for 10% off.
Any 15 undies or socks for 20% off.

Discount applies at checkout.
All packs excluded.

Select Colour

Black

Select Size

Back in stock reminder

Leave your email below, and we'll let you know as soon as this item is back in stock.

Oops, it looks like there was an error with your submission. Please try again later.

You're in! We'll let you know when it's back.

A boyleg brief made from super fine modal and RegSilk Protein™ Fibre. Engineered with Paire's trademarked NudeTech™ and BioTracker feature for superior hygiene. Super antibacterial, and soft on the skin.

Body: 88% Super Fine Modal (Tree Fibre), 12% Spandex. Gusset: 95% RegSilk Protein™ Fibre (85% Super Fine Modal, 10% Mulberry Silk), 5% Spandex.

Pay off your Paire in a few weeks by selecting ‘Afterpay’ at checkout.

We’ll foot the bill on shipping for domestic orders over A$100. Free worldwide shipping over A$200.

No questions asked. No shipping costs. We've all ordered things online but sometimes they just don't feel right. At Paire, if you have got the wrong size or just don't feel good, you have full 100 days to return it for a full refund.

Super-soft tree fibres

Powered by NudeTech™. Feels like a second skin.

Anti-smell & antimicrobial

RegSilk™ fibres stop bacteria from building up.

Never sweaty, always breezy

And refuses to reveal itself under tight pants. 

Brown

This is not your ordinary brief. Made with fancy things like our sustainable silk and signature squat-proof technology. So you can feel things like the perfect amount of stretch, without ever sagging, bending, or snapping. 

Our trademarked NudeTech™ gives your briefs that special touch. Made from plant-based Modal, it’s what makes them feel like a second skin—like you’re wearing nothing at all.

Made with RegSilk™—our regenerated silk cocoon protein fibres—which has antibacterial and anti-smell properties to keep your most sensitive bits happy and to stop bacteria from building up. The world’s first Pilates-proof panties. Thrush? Don’t know her. 

Not sure how old your underwear is?

With busy lives and schedules, most of us aren’t keeping tabs on when we last spruced up our drawers. So consider these undies your reminder app — their handy tracker changes colour with wear and time so you can see how long they’ve been in rotation for.

Designed with active proteins that sense external stimuli, BioTracker™ lets you decide when it’s time for a refresh.

Customer Reviews

Based on 113 reviews
82%
(93)
14%
(16)
2%
(2)
0%
(0)
2%
(2)
M
Miranda T.
Size (AU): 10-12
Purchased size: M
How it fits: True to size
Comfy as, bro

For me, great under workout gear (no lines) or trousers, or anything really. As comfy as everything else I’ve tried from this enviro conscious company. Loved the ethics, before I loved the invisible feel of the undies!

C
Chloe D.
Size (AU): 10-12
Purchased size: M
How it fits: True to size
Lovely

Material is soft and breathable. Minimised VPL. Took some getting used to - feels like you don’t have anything on!

H
Heather M.
Size (AU): 14-16
Purchased size: XL
How it fits: True to size
Comfy but no tracker

Comfy fit as advertised. But BioTracker inoperative. Tracker colour on the garment did not match what the info sheet indicated it would be and there has been no change since then,

L
Leah S.
Size (AU): 10-12
Purchased size: M
How it fits: True to size
Love love

I just love my new undies
So Comfortable and easy care
Will order more ready for next trip

D
Danielle B.
Size (AU): 20
Purchased size: 3XL
How it fits: True to size
Superb softness

Awesome style! So soft and comfy. Perfect fit. Feels like I’m not even wearing them. Purchased 2 different sizes and both fine .