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Recommended pairing
People pair the Everyday Brief with the Primus Lite Knit Womens as combining a comfortable, supportive brief with a breathable, lightweight top creates a balanced, all-day outfit that enhances comfort and style for everyday wear.
The Everyday Brief - Black blends soft-touch comfort with technical performance. Made from TENCEL™ Modal, a natural fabric derived from cellulose, it offers twice the softness of cotton and a barely-there feel. This high-performing fabric is breathable and helps wick away moisture for up to 10 hours, keeping the skin dry and irritation-free throughout the day.
The extended bamboo gusset features antimicrobial properties, helping maintain freshness and supporting intimate skin health. With an adjustable rise and cross-over waistband, the fit flatters every body shape while retaining its form wash after wash. Its adaptable stretch makes it suitable for pregnancy and postpartum wear, offering all-day ease without compromising support. The Everyday Brief - Sand is OEKO-TEX® certified, ensuring it’s free from harmful substances and safe for sensitive skin.
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Why Underdays is Healf
Underdays uses breathable fabrics that feel soft against the skin and adapt to your every move. Each piece carries the OEKO-TEX® certification, meaning it has been tested for harmful substances and proven safe for direct contact with your body. The fabrics offer all-day comfort without irritation, making them ideal for both busy routines and moments of rest.
Underdays was founded in December 2021 by Oria Mackenzie & Amelie Salas with a mission to reimagine underwear as a form of everyday self-care. Inspired by the idea that underwear should feel as good as it looks, the founders set out to create pieces that combine style, comfort, and performance. Each design is developed in collaboration with a gynaecologist to support women through daily routines, active moments, and everything in between. By focusing on breathable fabrics and thoughtful fits, Underdays empowers you to feel confident, supported, and comfortable every single day.
With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.
Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.
Every product undergoes our Healf Curation Process. With it, you can shop confidently knowing that every item has been tried and tested before it reaches you. Our Healf Curation Process includes three key steps: Brand Discovery, Expert Validation, and Community Testing. Through these, we assess quality, ingredients, effectiveness, and more, ensuring that every product empowers your wellbeing.
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How can I find out more about the ingredients in a product?
We love people who check ingredients as carefully as we do, so you'll find detailed information about the ingredients used on every product page (where applicable). If you see something you'd like to flag with us or have additional questions, please don't hesitate to get in touch—we'd love to hear from you.
Every product undergoes our rigorous Healf Curation Process, ensuring you are always getting the best when it comes to your wellbeing.
The Discovery
Our approach keeps us at the forefront of wellbeing. With our global network of health professionals and AI-powered trend analysis, we curate the leading supplements, tools, and tech that pioneer the industry.
Expert Validation
Each product at Healf is carefully examined by a panel of industry specialists—including dieticians, personal trainers, psychologists, and sleep experts—to ensure it meets our high standards for quality, efficacy, and ingredient formulations.
Community Testing
By collaborating with a dedicated group of customers who test and review each product, we ensure that only those truly beneficial to your wellbeing are offered here at Healf.
The Discovery
Our approach keeps us at the forefront of wellbeing. With our global network of health professionals and AI-powered trend analysis, we curate the leading supplements, tools, and tech that pioneer the industry.
Expert Validation
Each product at Healf is carefully examined by a panel of industry specialists—including dieticians, personal trainers, psychologists, and sleep experts—to ensure it meets our high standards for quality, efficacy, and ingredient formulations.
Community Testing
By collaborating with a dedicated group of customers who test and review each product, we ensure that only those truly beneficial to your wellbeing are offered here at Healf.