The Brief Set

The Underdays Starter Kit

$89.00

Style :

Brief Mix Thong

Size :

Size guide

XS S M L XL XXL

Product fit

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Free US Delivery over $75
Free US Returns & Exchanges

Meet the Underdays Brief Set — the easiest way to discover our cult-favorite underwear. Inside, you’ll find three of our bestselling full-coverage Everyday Briefs. Each pair is thoughtfully designed for all-day comfort and support—luxuriously soft, breathable, and made from all-natural TENCEL™ Modal. Finished with our sleek Scuba Cloud Pouch, it arrives ready to gift (or keep). The perfect set to start a fresh, intentional underwear drawer.

  • The Everyday Collection is crafted from buttery-soft, breathable fabrics — designed for comfort on busy days.

  • An antimicrobial gusset supports intimate health — from daily wear to days in motion.

  • Flatters every fit and holds its shape wear after wear.

  • Comes in our Scuba Cloud Pouch — your sleek, on-the-go essential for gym, work, or weekend trips.

•92% Tencel Micromodal, 8% Elastane
•Gusset: 47% Modal, 46% Cotton, 7% Spandex
•All fabrics are OEKO-TEX certified (SH015 210990 Testex)
•Made in Cambodia

Finally—underwear that wins 5* reviews for washing well and holding its shape. No more holes, this style was built to last.
•Cool wash, 40° max.
•Air-dry flat in a shaded area
•Do not iron or tumble dry
•Wash in garment bag

• Standard Shipping $8 / Free over $75 (3 - 5 working days)
• Express Shipping $28 (1 - 2 working days).

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Your underwear deserves better

You care about your skin, your wellness, your rituals. We’re pioneering care for your most intimate parts.

Twice the softness of cotton

Our underwear is made from TENCEL™ Modal—sustainably derived from trees and twice as soft as cotton. Gentle on the skin and made to feel like nothing at all.

Let your ____ breathe freely

TENCEL™ fibers are unfavorable for bacteria growth. They wick away moisture and keep you fresh through the day. Designed to help reduce the risk of unwanted infections.

OEKO-TEX Certified

OEKO-TEX® certified —clean, non-toxic with no harmful substances

Set apart by design

High Street Brand

TENCEL™  modal antimicrobial fabric derived from trees

Synthetic fabrics

Tested by real women, with over 1,000 five-star reviews

Engineered for optimal airflow and breathability

Traps moisture

A 2cm extra-long gusset for everyday protection

Soft leg elastics designed to eliminate digging in

Harsh seams

Product details