★★★★★ 4.6 / (88)

The Mix Starter Kit

$122.00 $63.00

Style : Mix

Size :

Product fit
Small
Perfect Loose
1
Free US Delivery over $70+
Simple Returns and Exchanges

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The idea behind it +

The easiest way to discover the pairs you will reach for daily. The kit gathers three favourites from our Everyday range (the Brief, the Thong and the Cheeky) plus the new blue Scuba Cloud Pouch, so refreshing your drawer is effortless. Each pair is made from silky-soft TENCEL™ Micromodal and finished with UNDERskin™, our fabric technology infused with skincare.

Details +
  • Three favourites from the Everyday range
  • Includes the new blue Scuba Cloud Pouch
  • Silky TENCEL™ Micromodal
  • With UNDERskin™ technology
  • Airy comfort from dawn to dusk
  • Extra-long gusset
  • Fit that adjusts
  • Holds its shape through repeated washing
  • Designed for daily wear
Composition and upkeep +
  • 92% TENCEL™ Micromodal, 8% Elastane
  • UNDERskin™: prebiotics and probiotics woven into the fabric support the natural microbiome of your skin. Driven by HeiQ Skin Care™, lasting through as many as 40 washes.
  • Certified to OEKO-TEX® (26.HCN.12854)

Made to hold up wash after wash.

  • Wash cool, 40°C maximum
  • Dry flat in the shade
  • No ironing and no tumble dryer
Shipping and returns +

US: free delivery on orders of $70 or more, with express delivery available at checkout.

Shipping outside the US: rates and times are in our FAQs.

Sizing +

Your underwear deserves better

Your skin, your wellbeing and your routines matter to you. We bring that same attention to your most intimate areas.

Powered by UNDERskin™

Prebiotics and probiotics are built into the fabric and pass to your skin through the day. They help your microbiome, reinforce the skin barrier and support healthier-looking skin. 100% biobased and developed in Switzerland.

Double the softness of cotton

We make our pieces from TENCEL™ Modal, a fibre sourced sustainably from trees that feels twice as soft as cotton. It is kind to skin and barely noticeable when worn.

Let your ____ breathe

Bacteria struggle to grow on TENCEL™ fibers. They pull moisture away and leave you feeling fresh all day, which can help lower the chance of unwanted infections.

OEKO-TEX Approved

Certified by OEKO-TEX®: clean, non-toxic and free of harmful substances

Set apart by design

High Street Brand

Antimicrobial TENCEL™  modal fabric that comes from trees

Synthetics

Prebiotics + probiotics woven into the fabric to support a healthier skin microbiome

Proven by real women, with 1,000+ five-star reviews

Built for excellent airflow and breathability

Traps moisture

An extra-long 2cm gusset for protection every day

Gentle leg elastics made so nothing digs in

Harsh seams

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Customer reviews

4.65
★★★★★
88 ratings
5
4
3
2
1
Fit
Snug Perfect Roomy
What our customers think Auto-generated
Buyers love The Mix Starter Kit by Underdays for its very soft, airy fabric and a flattering fit that feels like a second skin. They also like the bright colour choices, the way the pieces keep their shape, and the handy pouch for storage.
Maria P ✓ Verified purchase
14 days ago
★★★★★

Perfect for a busy daily routine!

This kit mixes everyday briefs with high-rise ones, and the scuba pouch that comes with it is a nice extra. The fabric feels lovely, almost like silk. In my opinion the everyday brief cuts better than the full one, which lacks coverage at the back and sometimes shifts at the front because of the extra fabric. Still, the everyday brief wins overall... Read more

❤ Recommends this product
Fit
Snug Perfect Roomy
Kristy G ✓ Verified purchase
last month
★★★★★

Very soft, though short on coverage

The fabric is wonderfully soft and sits well at the waist, yet for a brief I expected more material across the back.

Fit
Snug Perfect Roomy
Emily U ✓ Verified purchase
last month
★★★★★

Lovely, comfy underwear

The fabric is so comfy, the style is pretty and it flatters a lot. They stay put without riding up, which is great!

❤ Recommends this product
Fit
Snug Perfect Roomy
Divya ✓ Verified purchase
2 months ago
★★★★★

Comfy with zero digging, recommended!

So comfortable and nothing tugs!

❤ Recommends this product
Fit
Snug Perfect Roomy
Alex I ✓ Verified purchase
2 months ago
★★★★★

Huge fan

Huge fan. Soft and flattering, and somehow still airy. I'm really pleased.

❤ Recommends this product
Fit
Snug Perfect Roomy