Scale your apparel brand with PFAS-free, certified leakproof period panties, incontinence underwear, and maternity garments, all sourced directly from our ISO 9001-certified facility.
Shantou Shanhao Knitting Co., Ltd. has spent more than ten years on one narrow thing: functional underwear. We're a factory-direct period underwear manufacturer, producing reusable leakproof menstrual panties, incontinence underwear, and maternity garments nothing else.
The factory sits in Shantou; the sales team works from Shenzhen so buyers get answers in their own working hours. Between the two floors we produce 300,000 panties and 200,000 bras every month, and an in-house development team keeps improving fabrics and construction rather than waiting for a supplier to do it.
Every order moves through five controlled stages before it ships — this is the technical discipline behind our certifications.
Custom fit, construction and spec sheet built to your brief.
Physical samples produced and shipped in 5–7 business days.
Certified, OEKO-TEX-tested materials checked before cutting.
Patented 4-layer absorbent core assembled and quality-checked.
Packaging audit, then export to your market of choice.
Quality management, material safety, organic and recycled content, and ethical manufacturing — verified by third parties. Tap any certificate to read it full size.
PFAS in period underwear has triggered recalls across the US and EU. Ours is screened out at fabric intake — before a single panel is cut.
| Feature / standard | Shanhao manufacturing specs | Standard trade supplier |
|---|---|---|
| Factory certifications | ISO 9001, OEKO-TEX 100, GOTS, BSCI | Basic ISO only or unverified |
| Leak-proof core tech | Patented 4-layer, PFAS-free tested | Generic TPU film layer |
| Sample turnaround | 5–7 business days | 14+ business days |
| Monthly production capacity | 500,000+ units / month | Varies / subcontracted |
| Who you talk to | The team running your production | A sales agent relaying messages |
Ten years supplying brands, distributors, retailers and e-commerce businesses across Europe, Australia, the Americas and South Africa.
Startups and growing brands building a period, maternity or incontinence line with their own branding and packaging.
Low MOQ · sample in 5–7 daysAmazon sellers, Shopify stores, TikTok Shop vendors and DTC websites that need reliable production and quick restocks.
Repeat orders · batch consistencyLarge production capacity, competitive pricing and strict quality control make Shanhao a dependable partner for volume buyers.
500,000+ units / monthPrivate-label manufacturing tailored to your brand's specification — absorbency, fabric, fit, label and carton. Pick a category to see what comes off our lines.
15–35 mlThe everyday best-seller. Mid rise, full rear coverage.
View range →15–30 mlLower cut, slimmer core. Lace trim available.
View range →30–50 mlTummy coverage and the widest gusset in the range.
View range →15–20 mlLight-day and liner use. Invisible under fitted clothing.
View range →30–50 mlLonger leg, no ride-up. Popular for teens and sport.
View range →50–65 mlExtended front-to-back coverage for heavy nights.
View range →Lace trimDecorative edge over the same four-layer core.
View range →SeamlessLaser-cut edge, no stitch line, invisible under leggings.
View range →50–80 mlMax-capacity core with odour-neutralising inner face.
View range →30–50 mlDay-wear brief for light to moderate leakage.
View range →Up to 80 mlFront-weighted core, discreet under trousers.
View range →40–60 mlShorter leg, elastic waistband, washable design.
View range →Slim coreLow-profile lining that stays flat in water.
View range →Chlorine-safeLonger leg for teens and active swimmers.
View range →Full bodyWater-repellent shell with integrated leak lining.
View range →High waistExtra coverage with a wide bonded waistband.
View range →Drop cupOne-hand clip, wire-free, four-way stretch cup.
View range →Belly supportOver-bump panel that stretches through all trimesters.
View range →50–80 mlHigh-capacity core sized for the fourth trimester.
View range →SeamlessWire-free and lightly lined, to round out a line sheet.
View range →DaySnap-wing pad with the same four-layer core.
View range →NightLonger body and higher capacity for overnight.
View range →WaterproofZip carry pouch for used pairs — the natural bundle-in.
View range →No coreSeamless briefs and dance underwear, no absorbent layer.
View range →Every category available OEM or ODM · samples in 5–7 days
Request samplesThe styles our partners come back for. Every one can be rebuilt to your spec — different absorbency, fabric, trim, label and carton.
Ranked by order volume across our partner brands
See the full catalogueVerified reviews left on our Alibaba storefront by the brands and distributors who source with us.
The product is exactly as requested to my customization. I will be back for more.
Bought this for my wife who absolutely loved it. Sizing is accurate and delivered promptly.
Size 4XL is very short, it makes it sexy. Reliable and serious store, I recommend this store. Fast shipping.
This garment is ok. Material is a little scratchy. I was given material swatches as options which I decided to use in my next sample.
Great product like always. Shipping took longer than expected but very happy with goods.
Everything is fine, the products come organized and well packaged. The quality looks quite good.
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The questions that come up in almost every first conversation — answered plainly, without the sales language.
Send it over with your product idea and target volume. You'll get a real answer from the people who would run your order.
Ask our teamBoth. Send us a tech pack and we'll build to it, or start from our existing development library and adapt it. That covers custom patterns, private labelling, logo printing, packaging development, fabric sourcing and absorbency customisation.
ISO 9001 for quality management, OEKO-TEX Standard 100 for material safety, GOTS and OCS for organic content, GRS for recycled content, BSCI for social compliance, and FDA registration. Certificates are issued on request and per shipment.
Organic cotton, bamboo fibre, modal, recycled polyamide and nylon/elastane blends — all OEKO-TEX certified. Material selection is usually driven by your target market and price point, and we'll advise on the trade-offs before sampling.
Five gates: fabric inspection at intake, in-line production monitoring, absorbency testing on the laminated core, stitching and sizing verification, and a final packaging audit. A dedicated QC team signs off each stage before the order moves on.
Samples ship in 5–7 business days. Bulk lead time depends on fabric availability and order size, and we quote it with the price rather than after. MOQs are flexible for private label launches — tell us your target volume and we'll tell you honestly whether it works.
Yes, and we test rather than assume. The leak barrier uses a breathable membrane with no fluorochemical coating, and finished goods are screened for PFAS, phthalates, parabens and heavy metals. Test reports are available on request.
Europe, Australia, North America, South Africa and across Asia — 40+ export regions in total. We're familiar with the labelling and compliance requirements that differ between them, so tell us the destination early.
Cost breakdowns, quality control checkpoints and supplier-selection guides — written for the people who actually place the orders.
How the maths works out against disposables over a two-year ownership window.
The checks that separate a real factory from an agent with a good catalogue.
Where batches actually fail, and what a buyer should ask to see at each stage.
A thinner core that holds more — what changed in the lamination process.
New guides published every month
Read all articlesWhether you're launching a new brand or moving production away from an agent, send us the brief. You'll get a real answer from the people who would run your order.
We reply within 24 hours with a detailed proposal — pricing, lead time and next steps.
Choose your flow type based on the number of pads, tampons or cups you use in approx. 12 hours.
These are guide figures, not medical advice. Absorbency is measured under lab conditions and real-world results vary with fit and activity. If your flow soaks through in under two hours, speak to a healthcare professional.
Shanhao ProFlow Heavy Flow Period Underwear — find your true-to-size fit.
| Size | US | UK | EU | Hip (cm) | Waist (cm) |
|---|---|---|---|---|---|
| XS | 4–6 | 8–10 | 36–38 | 88–92 | 66–70 |
| S | 6–8 | 10–12 | 38–40 | 92–96 | 70–74 |
| M | 8–10 | 12–14 | 40–42 | 96–100 | 74–78 |
| L | 10–12 | 14–16 | 42–44 | 100–104 | 78–82 |
| XL | 12–14 | 16–18 | 44–46 | 104–110 | 82–88 |
| 2XL | 14–16 | 18–20 | 46–48 | 110–116 | 88–94 |
| 3XL | 16–18 | 20–22 | 48–50 | 116–122 | 94–100 |
| 4XL | 18–20 | 22–24 | 50–52 | 122–128 | 100–106 |
Swipe sideways for EU, hip and waist
Wrap the tape around the narrowest part of your natural waistline.
Measure around the fullest part of your hips with feet together.
Between two sizes? Size up for a relaxed, overnight-ready fit.
Measurements are body measurements, not garment measurements. Tolerance is 1–2 cm on finished garments. For private-label orders we can build to your own size spec.
