Arch4 is a British cashmere house, founded in Chelsea. Designed in London and gathered in Inner Mongolia, our 100% cashmere knitwear is devoted to the finest fibre in the world. Within our range, the Baby Cashmere collection stands as the rarest expression of our craft.
From our beginnings in Chelsea, our pursuit has been singular; modern, discreet elegance, expressed through the world's finest cashmere.
Traceable & Responsibly Sourced.
Specialists in Baby Cashmere.
Designed Exclusively in London.
Our expression
At Arch4, our aesthetic is timeless. We seek the perfect balance between feminine grace and subtle masculine strength, creating forms that are as considered on the body as they are refined in detail.
Every piece is shaped to feel effortless, yet weighed in every choice of silhouette, proportion, texture and finish. Refined simplicity is the principle that guides each decision, allowing the purity of the fibre to speak for itself.
Craft & Creation
Every Arch4 piece begins at our partner mill in the highlands of Inner Mongolia. Renowned as the region's foremost producer of baby cashmere, the mill brings the same exacting standards to every fibre we work, across the full range.
Here, the finest cashmere is shaped through expertise, patience, and precision, transforming rare raw material into knitwear of extraordinary softness and enduring beauty. Each creation is born from deep respect: for nature, for craftsmanship, and for the hands that bring our designs to life. From fibre to finished garment, integrity is woven into every stage.
Discover how to care for your cashmere and preserve its softness.
Mastery
In the extreme climate of Inner Mongolia, Capra Hircus kids develop a hidden second coat beneath their outer fleece — an ultra-fine underlayer that traps air and protects them from the cold. This soft mantle is the source of all cashmere.
Baby Cashmere is a treasure of unparalleled rarity. It can be gathered only once in a lifetime, when the kids are less than a year old. The result is just 30 grams of whisper-light fibre per animal, measuring an exceptional 13.5 microns in diameter.
Rare, delicate, and incomparably soft — Baby Cashmere is the purest expression of Arch4's pursuit of perfection.
Baby Cashmere
In the extreme climate of Inner Mongolia, Capra Hircus kids develop a second, hidden layer beneath their outer coat—an ultra-fine underfleece that traps air and protects against the cold. This soft mantle is the source of all cashmere.
Baby Cashmere, however, is a treasure of unparalleled rarity. It can be gathered only once in a lifetime, when the kids are less than a year old. The result is just 30 grams of whisper-light fibre per animal, measuring an exceptional 13.5 microns in diameter.
Rare, delicate, and incomparably soft, Baby Cashmere represents the purest expression of our pursuit of perfection.
Responsibility & Sustainability
Every Arch4 creation begins with respect — for nature, for craftsmanship, and for the people who make our work possible. Responsibility is not an addition to our process; it is intrinsic to beauty.
Our cashmere is fully traceable and responsibly sourced, certified by the Global Organic Textile Standard (GOTS). As a member of the CCMI Cashmere Group, we uphold the highest principles of sustainability; protecting the environment, the animals, and the communities at the heart of our work.
