Our story
We spent three years on one hinge.
SIAX began with an irritation: great earbuds, terrible pockets. Every case was a brick. So we asked a stubborn question — what if the whole acoustic chamber could fold? Three years, 214 prototypes and one machined cobalt hinge later, Fold Buds were the answer.
Design philosophy
Small is a feature. Folding is the feature.
We refused the usual trade — smaller size, smaller sound. Instead we split the chamber along a precision hinge, so the driver keeps its full volume when open and halves its footprint when closed.
Every tolerance is held to 8 microns. Every fold ends the same way: with the snap.
Materials index
Chosen slowly. Built to last.
01
Anodized cobalt hinge
Aerospace-grade aluminum, color-anodized in a single bath for a finish that can’t chip — only wear in, beautifully.
02
Bio-resin shell
A castor-oil polymer that’s 41% plant-based and survives drops that crack ordinary ABS.
03
Memory-silicone tips
Body-temperature adaptive silicone that seals in seconds and stays sealed for hours.
04
Graphene drivers
11mm graphene-coated diaphragms — stiff where they must be, light everywhere else.
05
Recycled cobalt cell
A 30-hour case battery built from 78% reclaimed cobalt, certified and replaceable.
