

THE UNDERS SET OF 3 - BLACK ONYX
The holy grail of comfort — three deep. A triple-threat of softness, swagger, and everyday gold for your package.
This trio of TreeSilk™ Unders in Black all feature our signature Black & Gold Jacquard waistband, a luxe crown for your lower kingdom. TreeSilk is One Golden Thread's signature blend of TENCEL Micro Modal — regenerative beech tree fiber from Lenzing AG's forests in Austria — and ethical cotton.
Your family jewels will thank you profusely — and be prepared for rampant girlfriend thievery. She will love. She will claim. She will not give them back. Includes:
- 3 Unders in Black
Everything arrives with a complimentary canvas tote bag - our gift to you. Every piece plants a tree — three pairs, three trees, all vibe.
Handcrafted at our family-run, woman-owned partner facility in Los Angeles, with ethical production in Mexico using blue-line certified dye houses in Downtown LA.
AS SEEN ON YOU
APPAREL FOR THE CONSCIOUS COLLECTIVE
Frequently Asked Questions
TreeSilk™ is One Golden Thread's proprietary fabric — a blend of European Beechtree fiber and the top 1% of ethical cotton. It's ultra-soft, stretchable, and breathable, with a "second skin" feel in Jersey weight and a plush, cashmere-like hand in French Terry. The reversible French Terry version even offers a built-in temperature swing: wear the fuzzy side in for warmth, or flip to the smooth side to stay cool.
TreeSilk™ comes in four varieties: RAW (ultra-fine, fluid, and cooling), Jersey (the signature "second skin" feel), Fleece (soft, steady, and thermodynamically calm — that's the reversible French Terry with the 15° warm/cool flip), and Linen (a breathable blend of European Flax® linen, beech tree fiber, and California cotton for structured, elevated ease).
Pieces are ethically handmade with fair wages in LA and Mexico. You can also shop in person at the brand's flagship store at 1216 Abbot Kinney Blvd., Venice, CA, open daily 11am–7pm.
Orders over $200 ship free within the US. Returns are accepted on brand-new unworn-items with tags attached, as long as the return package is sent into transit within 15 days of your order delivery date. Orders returned after 15 days are eligible for exchange or store credit only.