

Crocz
Green gator print, across men's, women's, and kids' styles.

My Love is the Sea
Swallows mid-flight, roses in bloom, ships riding the swell

New Melange Range
Stonewash Grey & Desert Sage

Commandos
Don't go commando, get Commandos.

CloudPress Pro
Compression that actually breathes

Yacht Rocks Vol. 3
Classic nautical stripes in timeless sage green.

New Release - X-Cup!
Jockstraps haven't changed in decades. Until now.

NiteKnit Sleepwear
Engineered for rest & recovery
Low as £9.84
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Add more pairs to unlock Mixed Colours bundles
Limited to one per order
Introducing our Capri Yellow SmoothFit Thong from Step One, where comfort meets confidence in the freshest shade of the season. Designed to make you feel effortlessly amazing, this thong offers a seamless and minimalistic silhouette that accentuates your natural curves.
Why You'll Love It:
The breathable bamboo viscose fabric keeps you feeling fresh and cool all day long, while the seamless construction ensures a smooth, irritation-free fit that disappears under any outfit. Minimal coverage meets maximum comfort—offering the support you need with the barely-there feel you want.
Crafted with sustainable bamboo, a renewable resource that's as kind to the planet as it is to your skin. Feel good about what you're wearing, inside and out.
Premium Features:
Fresh. Confident. Sustainable.
The Capri Yellow SmoothFit Thong is your new go-to for those days when you want to feel light, fresh, and completely comfortable. Because the best underwear is the kind you forget you're wearing—until you remember how good it feels.
We aim to dispatch your order 1-2 business days after placing your order.
Free shipping, no minimum spend.
GENERAL SHIPPING TIMES:
UK Mainland = approx. 2-3 business days after dispatch.
International shipping is available and calculated at checkout.
We are so confident 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.
Enter your measurements to get a size recommendation.
Measure around your natural waistline.
We couldn't match that measurement. Check the size chart below.
We recommend size
Step One underwear is designed for comfort. If you are between sizes, we recommend sizing up.
Underwear so comfortable, you'll forget you're wearing it.
Our SmoothFit™ technology provides a completely seamless finish, meaning no visible lines and no digging in.
Designed for everyday wear, providing a soft touch against your skin while staying perfectly in place.
Naturally hypoallergenic bamboo viscose is gentle on sensitive skin and prevents irritation.

Trust Score 4.5/5
Compare our styles to find your perfect fit.

Love them or they're free. If you don't love your first pair, we'll give you a full refund.