Brief
Add all pairs to qualify.
-
Free US shipping over $95
Free US exchanges
- Ultra-soft and breathable
- Signature curved waistline
- No-dig seams designed to disappear
- Four-way stretch for ease and movement
- Real-body tested fit
- Designed in collaboration with a gynecologist
- LENZING™ micro modal 91% micro modal 9% elastane
- GOTS Certified organic cotton gusset
- OEKO-TEX® Standard 100 certified
- Machine wash cold
- Tumble dry low
- Do not iron or dry clean
Fits true to size. If you’re in between sizes, we recommend sizing down.
We offer Free Shipping on all US Orders over $95 and Free returns on all US exchanges.
To be eligible for returns, items must be unworn and in their original condition. For hygiene reasons, all returns are inspected. Items that do not meet these requirements may be refused.
You’re going to live in Cy.
Material Integrity
OEKO-TEX® Standard 100 certified. GOTS certified organic cotton where it matters most. Consciously sourced and health informed by a leading gynecologist.
Intentional Design
Every silhouette is shaped through extensive real-body testing across sizes. A balanced, stay-put fit designed to move naturally with the body.
Confidence Through Comfort
Second-skin softness. Breathable construction. No-dig seams and subtle stretch that support without distraction. Designed to feel as good as it looks.
MORE IN ONYX
The Foundation in Onyx (Pack)
Thongs Only in Onyx (Pack)
The Brief in Onyx (Pack)
The Complete Essential in Onyx (Pack)
The Reset in Onyx (Pack)
THE REVIEWS ARE IN
I do laundry just to wear these again.
So grateful to finally find a pair without all the hidden synthetics.
I've bought my wife 100+ pairs of underwear. Cy is the first brand she's obsessed with.
Ok but these are truly soooo good! Literally the first one's I grab every time
