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Women's Underwear

BioFlex™ Ultra Seamless Full Brief (Final Sale)

$21.01
$36.80

Final sale items are not eligible for return, exchange, or online voucher if you change your mind.

By purchasing a final sale item, you agree that the item cannot be returned for a change of mind. We recommend choosing carefully to avoid disappointment and suggest contacting customer care for any assistance prior to purchasing.

Full-rise, full-coverage seamless BioFlex™ brief that stays put all day.

Colour:

Beige

Size

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Body: 86% BioFlex™ Nylon (50% Bio-based Nylon, 50% Nylon),14% Spandex. Gusset: 95% RegSilk Protein™ Fibre (88% Modal, 12% Silk), 5% Spandex.

Machine wash in a mesh bag on a gentle cycle below 30ºC, using a mild, enzyme-free detergent. No bleach, fabric softener or tumble drying; air-dry flat.

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$120. Free worldwide shipping over A$200.

Learn More

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.

Learn More

Any 4 undies or socks for 5% off.
Any 6 undies or socks for 10% off.
Any 10 undies or socks for 15% off.

Discount applies at checkout.
All packs excluded.

Sizing Chart

BioFlex™ Ultra Seamless Full Brief (Final Sale)

XS S M L XL 2XL 3XL
AU
6-8
8-10
10-12
12-14
14-16
16-18
18-20
US
0-2
4-6
8-10
10-12
12-14
14-16
16-18
Hips (CM)
85-90
90-95
95-100
100-105
105-110
110-115
115-120
Waist (CM)
60-65
65-70
70-75
75-80
80-85
85-90
90-95

In between sizes? We suggest sizing up.

Second-skin softness

So comfy you’ll forget you’re wearing them

Irritation free

No seams, no tags, no constant readjusting

Easy breezy

Naturally breathable fabric keeps things comfy and breezy

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Product Features

BioFlex™ bends the rules of conventional fabric. Made from 50% recycled corn waste, our bio-based material is created through an innovative process in which starch glucose is extracted from straw and regenerated into a nylon fibre.

The result? A durable fabric that’s lighter than air and soft as butter. Superior breathability and four-way stretch. A skin-hugging fit that’s moves with you.

Undies that ride, roll and bunch up are a thing of the past. Featuring no-slip silicone grippers on the leg-line and moulded grip zones, you can trust these undies to stay put.

VPL who? A seamless construction creates a smooth silhouette, while laser cut edges eliminate lines under clothing.

Thanks to a gusset made with RegSilk™, our material of regenerated silk cocoon protein fibres, these undies keep you fresh all day. Beat odour. Stop bacteria in its tracks.

  • 5 stars: 13 (26%)
  • 4 stars: 7 (14%)
  • 3 stars: 6 (12%)
  • 2 stars: 9 (18%)
  • 1 star: 15 (30%)
S
Sarah
Terrible underwear!

I bought 4 pairs of these although usually have the bio tracker full briefs. They are terrible and have all gone in the bin after 1 wear! Paire need to stop selling these! They do not stay in place at all they ride up so they sit in your bottom! They have a sticky part around the legs presumably to hold them in place that peeled of the first time I wore them! Wish I had read the reviews before I bought them!

D
Diane M.
Dm

Good but still prefer the lipstick original undies. Just ordered another pack of 3 now. Thank you. They are fantastic.

A
Annee M.
Did not respond to emails

Not a good experience with this company

L
Liliane G.
Perfect traveller companion

Light, almost invisible under garment. Dry overnight when travelling. Very feminine in looks!

M
Melinda D.
Hmmm

I tried 2 different sizes and unfortunately they rode up my bottom. I gave some to my friends and the same happened sadly. Otherwise the ordering/delivery/packaging/customer service was 10/10.

R
REbecca C.
Sizing confusion

Due to sizing different online to what was on the boxes resulted in my having an expensive pair of underwear I couldn’t wear as too but. The return process was good for the unworn pairs

J
Jannette F.
Very comfortable

Loving these undies, a bit expensive, but very comfy and a great fit.

s
sheryl w.
5 stars for Customer service 4 overall

I bought these a couple of years ago and that is why I bought a lot this time around. However, the fabric feels more sheer and the leg has been cut differently and is higher on the full brief than previously. I don't like that. I do like that the gusset liner has been extended, I wish all manufacturers would do this as that would make the garment more durable and comfortable.
Like most websites yours doesn't load properly all the time and I had to persist over a couple of days to get my order in and that is how I made a mistake. However, your customer service team are fantastic and went above and beyond. Keep them!

F
Felicity F.

I have worn a pair about 5 times and they are already falling apart, however beautiful soft fabric.

E
Elizabeth W.
Like wearing nothing

These full briefs are so comfortable - light and so soft.

a
asha t.

BioFlex™ Ultra Seamless Full Brief

R
Rosemary T.

Poor fit

M
Melanie V.
Disappointed

I had previously bought the travel pack of full brief underwear last year. I love Full briefs so thought I would give BioFlex Ultra Seamless. The measurements of fabric to make these seem to be out. The gussets glue started to peel off around the leg lining only 3 weeks after purchase. I have been carefully handwashing them. Size small is too small on the lining around private areas too narrow. Agree with other reviewers you do get ‘wedgies’ as underwear slips around in your daily movements. I won’t purchase these again

S
Sandra W.
Disappointed

I have bought the same size of full briefs previously but my recent purchase was disappointing as they didn’t fit. The back of the briefs were very loose and didn’t fit around my buttocks. Basically flapping in the breeze.

J
Jan L.

BioFlex™ Ultra Seamless Full Brief

T
Therese A.

BioFlex™ Ultra Seamless Full Brief

B
Barb D.

Fabulous, Light Undies

D
Deborah B.
Full brief

They are amazing the first lot where not so after your generosity of allowing me to order something different I am very happy and will order more closer to my trip

A
Andrina R.
Disappointing, not comfortable at all

I purchased paire underwear before but these did not live up to what they claimed to be. They didn’t stay in place and were extremely uncomfortable. Unfortunately not a good investment and I will be reluctant to it purchase these again.

C
Carolien W.

BioFlex™ Ultra Seamless Full Brief

G
Gabby C.
Gusset is glued on

The gusset is not sewn on and is glued together with the undies.
The glue didn't hold after the first wash and the gusset started peeling away after my first wear of them. I bought 2 of these and both had the same issue.

Extremely disappointed because these were very comfortable on my body :(

C
Customer

Love it

C
Cynthia K.
do not stay in place

I don't really like these. They don't stay in place, and the rubbery band is useless.

L
Lainey A.

Very comfy, but the little sticky thing on the edge that sticks to you leg (don't know what it's called) is peeling off, which is a bit disappointing after only a few years/washes.

J
Jondelle W.
Wedgie central

The material is lovely and silky to touch but the combination of the cut and the stretchy fabric causes the undies to ride up and pull in uncomfortable ways (and I hate the feeling of a g-string).
I sadly bought 3 pairs of these hoping they would fit the same way as the biotracker full briefs and they definitely don’t. These run smaller on the waist (which feels quite firm) and are really loose everywhere else. They are sadly quite uncomfortable so have been shoved into the ‘emergency’ section of the undies drawer.

P
Pauline L.

Very Comfortable

S
SunnyFi
Moves around all over the place :(

Advertised as stay-put but they really don’t. Put them on and immdiately they shifted and irritated me! I have the other full-briefs and love them. Don’t like this silky fabric as it feels too slippery under my active shorts and, again, they shift! Wedgie central.

K
Kerri A.

BioFlex™ Ultra Seamless Full Brief

C
Catriona F.

Beware if you are short waisted

V
V
Fell apart

The banding around the legs fell apart after the first wash and was unfixable. I’ve bought dozens of pairs from here and the few pairs I bought of seamless just didn’t last. Sadly disappointed and will be sticking to the normal full brief.

J
Julia S.

BioFlex™ Ultra Seamless Full Brief

P
Piret G.
Waistband too Tight

I have been very happy with previous purchases but this design has a tighter waistband which makes it much less comfortable to wear. Disappointed 😞.