What's the difference between 15-20 mmHg and 20-30 mmHg compression socks?

15-20 mmHg is classified as mild compression, suitable for everyday wear, travel, and light athletic recovery. 20-30 mmHg is classified as moderate medical-grade compression, typically sold through medical channels and used for varicose vein management, post-surgical recovery, and clinical applications.

Do compression socks need to be graduated?

For genuine therapeutic benefit, yes. Graduated compression means the pressure is highest at the ankle and decreases toward the calf. Non-graduated compression (uniform pressure) provides comfort but lacks therapeutic value.

What is the typical MOQ for custom compression socks?

For stock nylon-spandex blends in 2-3 sizes, MOQ at FOCS is 500 pairs per design. For medical-grade 20-30 mmHg constructions or custom jacquard logos, MOQ rises to 1,000 pairs per design.

Are medical compression socks regulated differently in the EU vs US?

Yes. In the US, 20-30 mmHg compression socks are Class II medical devices requiring 510(k) clearance. In the EU, they fall under EU MDR Class I with CE marking. Sourcing partners must understand and disclose the regulatory status.

Compression Socks Manufacturer: From Athlete Recovery to Nurse Relief

Why compression socks are different from regular socks

Compression socks are produced on circular knitting machines that vary the yarn tension along the height of the sock. The result is fabric that exerts graduated pressure on the leg — highest at the ankle, lowest at the calf. This mechanical pressure assists venous return, reduces swelling, and improves athletic recovery. Producing a functional compression sock requires specialized machinery, precise tension control, and post-knit pressure testing.

1. Understand the compression ratings

8-15 mmHg: ultra-mild, lifestyle, comfortable but not therapeutic.
15-20 mmHg: mild, suitable for travel, light athletic recovery, nursing everyday wear. Sold over the counter without prescription.
20-30 mmHg: moderate, Class II medical device in the US, requires 510(k) clearance for medical claims. Used for varicose veins, post-surgical recovery, chronic venous insufficiency.
30-40 mmHg: firm medical compression, prescription required in the US. Niche private-label opportunity.

2. Specify knitting technology

Three common production approaches:

Spandex-core knitting: spandex yarn is knit into every course. Produces uniform compression; common in 15-20 mmHg athletic socks.
Stitch-shape engineering: graduated compression through stitch density variation. Produces true gradient; common in medical-grade 20-30 mmHg.
Hybrid construction: combination of spandex-core and stitch-shape. Premium positioning, used in high-end European and US brands.

3. Choose the right fiber blend

Compression socks require nylon or polyamide base for durability, with spandex (Lycra) for stretch. The ratio matters:

80% nylon / 20% spandex: high compression, athletic-grade, 15-20 mmHg baseline.
70% nylon / 30% spandex: medical-grade, 20-30 mmHg achievable.
85% nylon / 15% spandex with Coolmax treatment: cooling performance for travel.
60% nylon / 30% merino / 10% spandex: premium outdoor positioning, harder to achieve true 15-20 mmHg.

4. Decide on graduated compression

For therapeutic effect, compression must be graduated. The standard medical-grade gradient is:

Ankle: 100% of rated pressure.
Calf: 70-80% of rated pressure.
Below knee: 50-60% of rated pressure.

Cheaper "compression" socks are often uniform pressure across the entire sock. These provide comfort but lack therapeutic value. Buyers should ask for graduated pressure testing reports.

5. Plan for medical channel distribution

If your brand will sell 20-30 mmHg compression socks in the US, plan for:

FDA Class II registration for the manufacturer or distributor.
510(k) clearance for the specific sock design (most are 510(k) exempt as substantially equivalent to predicate devices, but the documentation burden is real).
DME (Durable Medical Equipment) billing requirements if pursuing reimbursement.
EU MDR Class I + CE marking for EU medical positioning.

6. Specify sizing philosophy

Compression socks must be sized to fit. Three approaches exist:

Standard S/M/L: acceptable for 15-20 mmHg lifestyle compression.
Foot length + ankle circumference + calf circumference: medical-grade sizing, custom fitted.
Custom measured: premium positioning, requires fitting appointment, high MOQ.

7. Understand the test standards

Reputable compression sock suppliers will share test reports for:

Pressure profile testing: graduated pressure measured at multiple heights on the leg.
Stretch and recovery: cyclic loading to validate the sock holds compression after 50+ wash cycles.
AATCC 100: antibacterial finishing if claimed.

8. Watch for false compression claims

The most common scam in this category is selling "compression" socks with no actual graduated pressure — just a normal athletic sock marketed with compression language. Always request the pressure profile test report for the specific lot.

9. Plan realistic MOQ

For stock nylon-spandex blends in 3 size runs and 3 colors, MOQ at FOCS is 500 pairs per design (effectively 50 pairs per size/color combination). Medical-grade 20-30 mmHg or custom jacquard logos push MOQ to 1,000-2,000 pairs per design. Custom measured-program (DME) MOQ is much higher and typically justified only by clinical distribution.

10. Build the sales channel honestly

Compression socks work in three distinct channels — athletic retail, travel and lifestyle, and medical distribution. Each requires different labeling, different compression rating, and different pricing. Trying to sell a single SKU across all three channels usually fails. Plan a channel-specific portfolio from the start.

Why FOCS for compression sock manufacturing

FOCS produces compression socks at three tiers: 15-20 mmHg athletic/spandex-core at 500-pair MOQ; 20-30 mmHg medical/stitch-shape at 1,000-pair MOQ; and custom-measured DME programs at 5,000+ pair MOQ. We work with FDA-registered partners for US medical distribution and CE-marked partners for EU. Documentation includes pressure profile testing, fiber composition, and ISO 9001 quality system certificates. Custom jacquard logos and custom dye-lots available from 1,000 pairs per design. Lead time is 4-6 weeks for stock configurations and 8-12 weeks for medical channel designs.

For brands entering the compression market, the right launch is a 3-SKU lifestyle program (everyday 15-20 mmHg, travel, performance) using stock spandex-core constructions, validated at retail, before scaling to medical-grade or custom-measured programs.

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