Quality and safety
Last updated October 18, 2026
Where they're made
Our socks are made in an FDA-registered facility: the factory is registered with the US Food and Drug Administration as a device establishment. This is a registration of the factory, not an FDA approval or clearance of the socks.
Our socks are made by an ISO 13485-certified medical device manufacturer. Hunan Xiangzi Medical Devices Technology is certified to ISO 13485:2016, the international quality-management standard for medical device makers, by China Quality Certification Centre (CQC), certificate CQC25QY20024R1S/3600, valid to April 2028.
The nylon yarn in our socks is certified to OEKO-TEX® STANDARD 100 (certificate 16.HCN.90144, Hohenstein), held by the yarn maker Zhejiang Dingyi New Materials. The certificate covers the yarn; the finished socks are not separately OEKO-TEX certified.
Materials and compression
- Fabric: 70% nylon, 30% spandex.
- Graduated 15-20 mmHg compression, firmest at the ankle and easing toward the knee.
- Full-length side zipper with a soft fabric guard between the teeth and your skin.
Safety
Compression socks are not right for everyone. If you have peripheral arterial disease, poor circulation in the legs, heart failure, skin infections or open wounds, or reduced feeling in your feet, talk to your doctor before wearing them.
Take the socks off if you feel numbness, tingling, pain, or see a change in skin colour, and check your size with our size guide. Read who should not wear compression socks.