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Redefining underwear as everyday self-care.
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.
Designed for all-day wear and effortless movement, each piece combines soft, breathable fabrics with a flattering fit. From classic thongs to everyday briefs, Underdays underwear is created to help you feel confident and comfortable, whether at work, at the gym or just lounging at home.
Each design is developed in collaboration with a gynaecologist for everyday wear across daily routines, active moments, and everything in between. By focusing on breathable fabrics and thoughtful fits, Underdays aims to empower you to feel confident and comfortable every single day. As a UK stockist of Underdays underwear, browse the selection at Healf.
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Underdays underwear is crafted from ultra-soft TENCEL™ Modal, blended with elastane for stretch and comfort. The gusset combines modal, cotton and spandex for gentle, breathable wear, making every piece feel like a second skin.
Underdays underwear is made with sustainability in mind. All fabrics are OEKO-TEX certified, free from harmful substances and sourced from factories that meet strict environmental and social standards. They’re continuously improving, with a focus on ethical production and community impact.
Wash Underdays underwear on a cool cycle (maximum 40°C) inside a garment bag, then lay flat to air-dry in the shade. Skip the tumble dryer and iron to keep them soft and long-lasting.