The underwear that keeps selling out.


Alfie x Underdays Capsule Collection

Where the effortless feminine meets the everyday luxury. 

We partnered with Paris-based label luxury label ALFIE to create a limited edition capsule set of elevated summer essentials.

A collection with a “borrowed from the boys” feel, this launch celebrates ALFIE’s signature boxer shorts and Underdays’ solutions-driven design—all crafted from a luxury deadstock cotton sourced in Paris that is OEXO-TEX certified, meaning free from harmful chemicals. 

Designed in Paris, made in Europe. 


Our Promise

Pairing luxury fabrics, with world class design, our underwear was designed with a gynaecologist to solve your biggest pain points, while never sacrificing on style.

We are turning underwear into self-care.

We believe you deserve underwear that is just as high-performing and good-looking as what’s on your bathroom shelf.


• Soft and Breathable Fabrics

• Gynaecologist Approved

• Extended Bamboo Gusset

• Inclusive Sizing

• Ethical Sourcing

• 50+ Rounds of User-Testing


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