Why to ditch your cheap cotton underwear and switch to TENCEL™ Modal with Underdays.

When it comes to your everyday comfort your choice of underwear matters more than you think. Here is why upgrading your underwear makes all the difference to your body.

3 for 20% off


When it comes to everyday comfort, your choice of underwear matters more than you might think. Cheap cotton underwear might seem like a budget-friendly option, but you will find yourself replacing often and hating looking inside your underwear cupboard rather than having long-lasting underwear that you are proud to wear everyday.

Have you considered the benefits of upgrading to TENCEL™ Modal? We've got everything covered on why this fabric is taking the underwear market by storm. Here are five compelling reasons why every woman should make the switch:

#1: Moisture-Wicking Properties

"TENCEL™ Modal fabric has great moisture-wicking abilities: It dries quickly and prevents moisture from aborbing into your underwear, which helps regulate your body temperature and makes you feel fresh and dry throughout the day. Cotton, however, retains moisture, so it stays damp for a long time. This can lead to a damp and uncomfortable feeling, especially during physical activity or in humid environments. Moisture retention can also increase the risk of bacterial growth and odor."

#2: Enhanced Breathability

"One of the standout features of TENCEL™ Micro-Modal is its superior breathability. The fabric allows air to circulate freely, keeping you cool and comfortable, especially during warmer weather or strenuous activities. Say goodbye to sweaty discomfort and hello to a fresh, breathable experience with every wear. TENCEL™ Modal is lightweight, breathable, and absorbent, making it suitable for those who sleep hot, prone to infections or require a fabric that can help to regulate body temperature."

3 for 20% off


  • Unrivalled breathability & freshness
  • Soft leg elastics
  • Durability
  • Flattering shapes for every body

Supermarket / High Street Brands

  • Scratchy fabrics that trap moisture & breed infections
  • Side seams that dig in
  • Only lasts a few washes
  • Conventional Cuts
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#3: Unparalleled Softness

"Imagine slipping into a pair of underwear that feels like a second skin — that's the experience TENCEL™ Modal offers. Derived from sustainably harvested beech trees, TENCEL™ Modal fibers are exceptionally soft and luxurious to the touch. It is 2X softer than cotton, which can sometimes feel scratchy or stiff. This unmatched softness makes micro-modal underwear a luxury to wear all day long, providing a level of comfort that's hard to beat."

#4: Exceptional Durability

"Unlike cotton, TENCEL™ Modal fabric is durable and tough and has a longer lifespan than its alternatives. Despite its incredibly soft and delicate feel, micro modal is surprisingly strong and resilient. The fibers are less prone to pilling, fading, or losing shape over time, ensuring that your micro modal underwear maintains its like-new appearance and performance wash after wash. This durability not only extends the lifespan of your underwear but also offers excellent value for your money in the long run."

#5: Sustainability as a Priority

"The demand for sustainable fabric choices has become increasingly important. TENCEL™ Modal fabric stands out as a more eco-friendly option compared to conventional cotton. The production process of micro-modal involves using renewable beechwood pulp, which is sourced from responsibly managed forests. Additionally, the manufacturing process requires up to 20x less water and energy compared to cotton, making micro-modal a more sustainable choice for consumers."

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About Underdays

"Underdays began not in a high-end designer studio, but from a real-life challenges faced by founders Amelie Salas and Oria Mackenzie. Frustrated by the lack of comfortable and stylish options on the market. They were tired of choosing between beige high street basics or uncomfortable sexy lingerie.They were fustrated that women had all these other incredible products in their lives, but the ones that touched the most intimate areas were often of the poorest quality.

This personal struggle sparked the idea for Underdays – a brand that would offer, comfortable, breathable and ultra-flattering underwear solutions for women of all shapes and sizes. This journey from a simple fix to a fashion revelation laid the foundation for what Underdays is today – a brand built on the ethos of innovation, inclusivity, and personal experience."

Embracing Every Body

Underdays commitment to inclusivity is not just a trend, it's a mission. The brand's size range goes from XS - XXL and more sizes are on the way.

Revolutionizing Comfort

At the heart of Underdays lies innovation. Every product released is there to solve a problem and fits within their mission to bring you unparalleled comfort and style with no more compromises.

Eco-Friendly Fashion

Underdays isn't just about looking good, it's about doing good too. Their underwear is made from a natural fabric, which uses 20x less water than cotton. It's also designed for durability and to last many years, which means less consumption and less replacements.

Unmatched Quality

Every Underdays piece is made out of a luxurious micro-modal, a natural fabric designed to be twice as soft cotton. The fabric is designed for enhanced breathability, wicking away moisture and keeping you fresher for longer.

Everyday Confidence

Underdays is more than just underwear – the unmatched breathability and flattering fits are designed to make you feel confident and empowered in your everyday life.