BioTracker Full Brief

★★★★★ 4.7 · 512 reviews

$36.00

Or 4 installments of $9.00 with afterpay

A high-waisted brief with full coverage and a soft, flat waistband that does not dig in, made from super-fine modal with Paire’s trademarked NudeTech™. BioTracker™ changes colour gradually with wear and washing, giving a replacement prompt over time. An antibacterial RegSilk Protein™ Fibre gusset keeps it fresh and soft against the skin.

Colour—

Choose a colour and size

  • Free shipping Australia-wide
  • Dispatched within 1 business day
  • 100-day risk free trial
Materials

Composition and fabric details are printed on the pack. Made with responsibly sourced fibres, knitted for everyday wear.

Care Instructions

Turn inside out and machine wash on the wool or gentle cycle below 30ºC, using a mild, enzyme-free detergent. No bleach or fabric softener, and air-dry rather than tumble drying.

Pay Later

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

Free Shipping

We’ll foot the bill on shipping for all Australian orders.

100 Days Risk Free Trial

Take your time. Make sure it feels right. We want you to feel confident in your Paire. Take the time to try your new piece, check the fit and see how it feels. If it’s not right for you, you have 100 days to return it for a refund or exchange.

Size guide

Our socks come in S, M and L. If you're between sizes, go up — the cuff has plenty of stretch.

SizeAU / UKEUUS
S3–635–394–7
M6–939–437–10
L9–1243–4710–13

Reviews

512 reviews · 4.7 average
★ ★ ★ ★ ★ Verified buyer

Truely comfy underwear

Perfect for sweaty tropical weather. Dry over night when traveling

Lorraine H. · 10 Oct 2026 · Size (AU): 14-16; Purchased size: L; How it fits: True to size

★ ★ ★ ★ ★ Verified buyer

Best pants I have had

I am very sad that you are discontinuing these. They are the best pants I have ever had. Soft elastic and lovey fabric.

Fiona O. · 6 Oct 2026 · Size (AU): 14-16; Purchased size: M; How it fits: True to size

★ ★ ★ ★ ★ Verified buyer

I’ve purchased many pairs of these undies and they have always been the most comfortable I’ve owned, so I’ve been a loyal customer. Unfortunately, I’m very disappointed with my latest purchase. The glue around the gusset is disintegrating despite following the correct washing instructions, and every pair from this particular batch is doing the same thing. One pair the waist elastic has come loose, unravelled and is unsightly so needs to be binned. Not good enough for the price.
I’ve never experienced this with my previous purchases, so it seems to be an issue with this batch. Given the cost per pair, I expected much better quality and unfortunately I won’t be purchasing them again.

Patrice E. · 3 Oct 2026 · Size (AU): 10-12; Purchased size: M; How it fits: A bit loose

★ ★ ★ ★ ★ Verified buyer

Love these. So comfortable.
So slim and invisible under clothes.
No riding up , no “wedgies”.

Merrilyn · 1 Oct 2026

★ ★ ★ ★ ★ Verified buyer

High Quality Underwear

Look excellent, good quality & fit comfortably.
Made up with these

Zahra M. · 30 Sep 2026 · Size (AU): 18; Purchased size: XL; How it fits: True to size

★ ★ ★ ★ ★ Verified buyer

A good brief for travel

I ordered a pair to try before committing to a drawerful and the fit was fine but the nude color was a most unattractive hue and for the time lag to deliver as well as the price I will stay with another popular brand for the time being

Jennifer B. · 29 Sep 2026 · Size (AU): 10-12; Purchased size: L; How it fits: True to size

★ ★ ★ ★ ★ Verified buyer

Comfyand good fit!

Claudia D. · 27 Sep 2026 · Size (AU): 14-16; Purchased size: XL; How it fits: True to size

★ ★ ★ ★ ★ Verified buyer

Happy shopping

Size

Debbie L. · 24 Sep 2026 · Size (AU): 10-12; Purchased size: M; How it fits: A bit loose