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Buy less, wear better.
Your new necessity
Investment-quality underwear designed for comfort, health, and longevity.
Meet the Underdays Starter Kit
Comfort First
Breathable, weightless fabrics that feel calm on skin from morning to night.
Skin-Kind by Design
Thoughtfully chosen fibres that support everyday skin comfort.
Made to Last
Investment-quality underwear that holds its softness wash after wash.
INSIDE THE SET
A Better Foundation
Each set includes 3 pairs of breathable, pH-balanced TENCEL™ Modal underwear — designed to support your everyday routine. Plus our Scuba Cloud Pouch to keep your favourites close.
Exclusive £55 Starter Price (£33 off)
4.6
(88)
The Underdays Starter Kit
£48
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Preorder item
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What makes us different
Designed to feel like a second skin.
Proudly apart from others.
What makes us different
Designed to feel like a second skin.
Proudly apart from others.
Underdays
Others
TENCEL™
modal antimicrobial fabric derived from trees
Tested by real women
with over a 1,000 five-star reviews
Breathability
engineered for optimal airflow
Everyday protection
a 2cm extra-long gusset
Soft leg elastic
designed to eliminate digging in
