The Underdays Starter Kit
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This item is currently available for preorder only.
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Your closest layer matters
Your starter ritual:
Each set includes 3 pairs of breathable, pH-balanced TENCEL™ Modal underwear — designed to support your everyday routine.
Choose your set: Mix (Cheeky + Thong + High-Waist), All-Thong, or All-Brief.
All sets include our Scuba Cloud Pouch to keep your favourites close. £55 Starter Price (£33 off)
“This female founded lingerie brand is about to become your latest obsession”
“The best briefs”
“The underwear brand that is rewriting sexiness”
“This intimates label serves a new generation of empowered women”
“This female founded lingerie brand is about to become your latest obsession”
“The best briefs”
“The underwear brand that is rewriting sexiness”
“This intimates label serves a new generation of empowered women”
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.
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
What is inside the set?
3 pairs of our bestselling underwear in TENCEL™ Modal + our Scuba Cloud Pouch. Breathable, pH-balanced, and made for everyday comfort. £55 Starter Price (£33 off)
How do I know which size will fit me best?
All of our styles fit true to size. On each product page there is a size guide which we would recommend taking a look before making your choice. We also offer free returns and exchanges if you are unsure of your size.
How do I wash my Underdays?
We recommend washing all our underwear on a cool wash, maximum 40 degrees in a garment bag. Air-dry flat in shade. Do not iron or tumble dry.
What does OEKO-TEX certified fabrics mean?
All of the fabrics we use are independently certified by OEKO-TEX, meaning all our underwear is free from harmful substances.
How long will it take to ship?
We aim to fulfil orders within 2 -3 business days. For Standard Delivery, shipping will take 3 - 5 business days. For Next Day Delivery, please place your order before 1pm GMT (Monday-Thursday) to receive it on the next business day. Shipping times may be affected by busy sales periods such as the holiday season.
What's your returns policy?
You have 30 days from the date your order is despatched to return your order for a refund, exchange or store credit. The item must be unworn, unwashed and in the same condition it was delivered in (hygiene sticker intact and swing tag attached).
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