SmoothFit Bra

Lift & Support

SmoothFit Boyleg

Low Rise & Stretch

SmoothFit Thong

Everyday Comfort

SmoothFit Bikini Brief

Moderate Coverage

SmoothFit Full Brief

Full Coverage

Bikini Brief

Classic Cut

Body Short

Lounging

Shop Mens

For Him

Boxer Brief

Thicker Legs

Trunk

Thinner Legs

Boxer Brief Fly

Easy Access

Boxer Brief Sport

Longer For Activity

Long Johns

Full Length

Junior Trunk

Ages 6 - 14

Shop Womens

For Her

SmoothFit Bra

Lift & Support

SmoothFit Boyleg

Low Rise & Stretch

SmoothFit Thong

Everyday Comfort

SmoothFit Bikini Brief

Moderate Coverage

SmoothFit Full Brief

Full Coverage

Bikini Brief

Classic Cut

Body Short

Lounging

Shop Mens

For Him

[EXP-A] Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear - Model:Yolanda
Yolanda is 170cm tall, 70cm waist, wearing a size S
Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear
Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear - Model:Yolanda
Yolanda is 170cm tall, 70cm waist, wearing a size S
Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear - Model:Yolanda
Yolanda is 170cm tall, 70cm waist, wearing a size S
Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear - Model:Yolanda
Yolanda is 170cm tall, 70cm waist, wearing a size S
Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear - Model:Yolanda
Yolanda is 170cm tall, 70cm waist, wearing a size S
Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear - Model:Fabiana
Fabiana is 168cm tall, 83cm waist, wearing a size L
Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear - Model:Fabiana
Fabiana is 168cm tall, 83cm waist, wearing a size L
IN STOCK
X

30 Day First Pair Guarantee

We are so confident that you'll love your Step Ones...

We'll give you a FULL REFUND on your FIRST PAIR

If you don't like them for whatever reason

Bikini Brief - Ahoy Sailor

£14.90

Bikini Brief
(491)

Price as low as £9.90 with packs!

Colour: Ahoy Sailor

Originals:
[EXP-A] Women's Bikini Brief - Tap Shoe - Bamboo Underwear - Model:Yolanda
[EXP-A] Women's Bikini Brief - Ahoy Sailor - Bamboo Underwear - Model:Yolanda
[EXP-A] Women's Bikini Brief - Butter Scotch - Bamboo Underwear - Model:Yolanda
Women's Bikini Brief - Forest - Bamboo Underwear
Women's Bikini Brief - Ice Melt
Green Women's Underwear - Model:Alexandra
Light Green Bamboo Underwear for Women - Model:Alexandra
Red Women's Bamboo Underwear - Model:Alexandra
Limited Edition:
Women's Bikini Brief - Feelin' Lucky - Bamboo Underwear
Women's Bikini Brief - Love Covers - Bamboo Underwear
Women's Bikini Brief - Green Houndstooth
Women's Bikini Brief - Euro Streakers - Bamboo Underwear - Model:Sophie
Women's Starsign Underwear at Step One - Model:Sophie
Women's Bikini Brief - Virgo - Bamboo Underwear - Model:Sophie
Women's Bikini Brief - Libra - Bamboo Underwear - Model:Ashley H
Women's Bikini Brief - Halloween 2024 - Bamboo Underwear - Model:Sophie
Women's Bikini Brief - Scorpio - Bamboo Underwear - Model:Yolanda
Women's Bikini Brief - Jungle Birdz - Bamboo Underwear
Women's Bikini Brief - Mislips - Bamboo Underwear
Women's Bikini Brief - Tattoo Parlours - Bamboo Underwear
Women's Bikini Brief - Candy Canes - Bamboo Underwear - Model:Yolanda
Women's Bikini Brief - Christmas Biker - Bamboo Underwear - Model:Yolanda
Women's Bikini Brief - Sagittarius - Bamboo Underwear - Model:Ashley H

Bikini Brief Size Guide
Example: If you usually wear a medium, we recommend ordering a large.
Size
UK Size
Waist (CM)
 4XS
 0
40-44cm 
 3XS
 2
45-51cm 
 2XS
 4
 52-59cm
 XS
 6
 60-69cm
 S
8-10 
 70-76cm
 M
12-14
 77-82cm
 L
 16
 83-87cm
 XL
 18
 88-94cm
 2XL
 20
 95-101cm
 3XL
 22
 102-107cm
 4XL
 24
 108-113cm
 5XL
 26
 114-120cm

 

At Step Ones, we are incredibly confident that you'll adore your purchase. However, we understand that personal preferences vary, and if, for any reason, you don't like your first opened and worn pair, we'll be more than happy to provide you with a full refund. Customer satisfaction is our top priority, and we want you to feel completely at ease when shopping with us.
Even if you accidentally picked the wrong size, don't worry – we've got you covered! In addition to our first pair guarantee, we extend returns and exchanges to all unopened products. We want to ensure that you find the perfect fit and are completely satisfied with your Step Ones experience. Your comfort and happiness are essential to us, and we strive to make the entire process seamless and enjoyable. Shop with confidence and know that we're here to assist you every step of the way.

Our bikini brief range runs on the smaller side.  If you are unsure or in between sizes we recommend sizing up.

Frequently purchased together...

Bikini Brief Tap Shoe

 Sale price£14.90

Bikini Brief Butter Scotch

 Sale price£14.90

SmoothFit
Thong Rosé All Day

 Sale price£13.90

What makes Step Ones special?

Organically Grown Bamboo

This organic material, produced in a close-loop system, wicks away sweat and moisture and allows you to breathe all day long!

Super Comfortable

Our classic bikini brief is cut for comfort. The perfect go to staple for daily wear, our brief features a super soft, moulded waistband. The classic cut provides moderate to full coverage, perfect under all clothing.

Inclusive Size Range

Our underwear is designed for every body. Enhancing individual shape with the perfect fit & cut. We offer sizes 2XS - 5XL, and that's only the beginning!

Trustpilot

You may also like

[EXP-A] Women's SmoothFit Padded Bra - Espresso-Tini - Bamboo Underwear - Model:HollyWomen's SmoothFit Padded Bra - Espresso-Tini - Bamboo Underwear
Women's SmoothFit Padded Bra - Espresso-Tini Sale price£24.00
[EXP-A] Women's SmoothFit Bikini Brief - Blue Lagoon - Bamboo Underwear - Model:ElkeWomen's SmoothFit Bikini Brief - Blue Lagoon - Bamboo Underwear
Women's SmoothFit Bikini Brief - Blue Lagoon Sale price£15.90
[EXP-A] Espresso-Tini - Bamboo- Model:ElkeWomen's SmoothFit Full Brief - Espresso-Tini - Bamboo Underwear
Women's SmoothFit Full Brief - Espresso-Tini Sale price£16.90
[EXP-A] Women's SmoothFit Bikini Brief - Chic Champagne - Bamboo Underwear - Model:ElkeWomen's SmoothFit Bikini Brief - Chic Champagne - Bamboo Underwear
Women's SmoothFit Bikini Brief - Chic Champagne Sale price£15.90
[EXP-A] Women's SmoothFit Thong - Espresso-Tini - Bamboo Underwear - Model:ElkeWomen's SmoothFit Thong - Espresso-Tini - Bamboo Underwear
Women's SmoothFit Thong - Espresso-Tini Sale price£13.90
[EXP-A] Women's SmoothFit Bikini Brief - Rosé All Day - Bamboo Underwear - Model:ElkeWomen's SmoothFit Bikini Brief - Rosé All Day - Bamboo Underwear
Women's SmoothFit Bikini Brief - Rosé All Day Sale price£15.90
[EXP-A] Women's SmoothFit Full Brief - Chic Champagne - Bamboo Underwear - Model:ElkeWomen's SmoothFit Full Brief - Chic Champagne - Bamboo Underwear
Women's SmoothFit Full Brief - Chic Champagne Sale price£16.90
[EXP-A] Women's SmoothFit Full Brief - Piña Colada - Bamboo Underwear - Model:ElkeWomen's SmoothFit Full Brief - Piña Colada - Bamboo Underwear
Women's SmoothFit Full Brief - Piña Colada Sale price£16.90
[EXP-A] Women's SmoothFit Bikini Brief - Espresso-Tini - Bamboo Underwear - Model:ElkeWomen's SmoothFit Bikini Brief - Espresso-Tini - Bamboo Underwear
Women's SmoothFit Bikini Brief - Espresso-Tini Sale price£15.90
[EXP-A] Women's SmoothFit Thong - Blue Lagoon - Bamboo Underwear - Model:ElkeWomen's SmoothFit Thong - Blue Lagoon - Bamboo Underwear
Women's SmoothFit Thong - Blue Lagoon Sale price£13.90
[EXP-A] Women's SmoothFit Thong - Chic Champagne - Bamboo Underwear - Model:ElkeWomen's SmoothFit Thong - Chic Champagne - Bamboo Underwear
Women's SmoothFit Thong - Chic Champagne Sale price£13.90

First Pair Guarantee

We are so confident you'll love your Step Ones, we'll give you a full refund on your first opened and worn pair if you don't like them for any reason.

Free shipping on all orders!

Free shipping on all orders in the UK... how good!

Customer Service

Buy with confidence, our dedicated customer service team is available 24/7 to answer any questions you have!

Easy Returns

Picked the wrong size by mistake? No problem. On top of our first pair guarantee we also offer returns/exchanges on all unopened products.