Shanhao Undies | Certified Period Underwear Manufacturer
  • Home
  • OEM Product
    • Period Panties
      • Hipster
      • Bikini Brief
      • High Waist
      • Mid Waist
      • Thong
      • Boxer Short
      • Sleep Overnight
    • Women Ordinary Panties
    • Women’s Bras
    • Period Swimwear
    • Maternity Bra & Panties
    • Women Incontinence Underwear
    • Men Incontinence Underwear
    • Menstrual Pads
    • Dance Underwear
    • Sleepwear
    • Sportswears
    • WetBags
  • For Wholesale
    • Light Flow Panties
    • Medium Flow Panties
    • Heavy Flow Panties
    • Normal Panties
  • Ship From USA
  • About Us
    • Team members
    • F.A.Qs
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  • Blog
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0
  • Home
  • OEM Product
    • Period Panties
      • Hipster
      • Bikini Brief
      • High Waist
      • Mid Waist
      • Thong
      • Boxer Short
      • Sleep Overnight
    • Women Ordinary Panties
    • Women’s Bras
    • Period Swimwear
    • Maternity Bra & Panties
    • Women Incontinence Underwear
    • Men Incontinence Underwear
    • Menstrual Pads
    • Dance Underwear
    • Sleepwear
    • Sportswears
    • WetBags
  • For Wholesale
    • Light Flow Panties
    • Medium Flow Panties
    • Heavy Flow Panties
    • Normal Panties
  • Ship From USA
  • About Us
    • Team members
    • F.A.Qs
    • Gallery
    • Product Inquiry Form
  • Blog
  • Contact Us

Author: Nazim Shanhao

Period & Functional Underwear Manufacturer
2026-05-192026-09-14Product, Textile Fabric

Why We Are Shifting Toward Low-Water Manufacturing in Apparel (And Why It Matters)

In the apparel industry, we often talk about the final product, the fit, the fabric, and the function. But lately, I’ve been […]

2026-05-142026-11-06Testimonials

Why We Still Use Hand Bonding for Seamless Period Panties

https://shanhaoundies.com/wp-content/uploads/2026/05/Seamless-Period-Pantiess.mp4 The Challenge of Automation in Seamless Period Panties In the seamless underwear industry, there are now machines capable of automatic glue […]

sanitary pads vs period underwear OEM manufacturer
2026-04-102026-11-06Product, Testimonials

What’s Inside Your disposable Pads? The Truth Most Brands Don’t Tell You

Most women use sanitary pads every month without ever questioning what they are made of. They are often marketed as “soft,” “cotton-like,” […]

edge seal technology period underwear
2026-03-312026-11-06Product, Testimonials

Why Our Patented Edge-Seal Technology Outperforms Traditional Stitching in Period Panties

In the evolution of period underwear, one of the most critical yet overlooked innovations lies in edge construction. While most brands focus […]

GOTS-certified organic
2026-03-302026-11-06Product, Textile Fabric

Why Organic Cotton Is the New Standard for Period Wear (Complete 2026 Guide)

The demand for organic cotton period underwear is growing rapidly as consumers shift toward safer, PFAS-free, and eco-friendly menstrual products. Today’s buyers […]

seamless-period-underwear-scaled
2026-03-232026-11-06Product, Testimonials

Why Can Our Seamless Period Panties Be Put in the Dryer?

Unlike traditional stitched underwear, Shanhao seamless period panties are engineered for durability, convenience, and long-term performance even under high heat conditions. Our […]

seamless underwear
2026-03-132026-11-06Product, Testimonials

Why Seamless Bonding Is the Best Technique for Camel Toe Thongs

When it comes to thong underwear, comfort and invisibility are everything. A good thong should stay in place, feel smooth against the […]

period pants quantity guide
2026-01-292026-11-06Product, Testimonials

How Many Period Pants Do I Need? A Practical Guide for Every Flow

Switching to period underwear is a smart step toward comfort, sustainability, and convenience. One of the most common questions is: How many […]

packaging bag material
2026-01-272026-11-06Product, Textile Fabric

What Material Options Are Available for Packaging Bags?

At Shanhao, packaging is more than protection.It’s part of the product experience. For period underwear brands, the right packaging must balance functionality, […]

polyester-free period underwear
2026-01-232026-11-07Product, Testimonials

Why Over 70% of Disposable Sanitary Pads Contain Plastic and Can the period underwear be entirely polyester-free?

      Many disposable pads use plastic-based layers for absorbency and leak protection. Here’s why it happens, what it means for […]

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Shanhao Knitting

Shantou Shanhao Knitting Co., Ltd. is a factory in Shantou City with its sales department in Shenzhen. We specialise in reusable leakproof period underwear, incontinence wear and maternity garments, producing 300,000 panties and 200,000 bras every month for brands across Europe, Australia, the Americas and South Africa.

Products

  • Women Period Panties
  • Women Incontinence Underwear
  • Men Incontinence Underwear
  • Maternity Bra & Panties
  • Period Swimwear
  • Menstrual Pads
  • Dance Underwear
  • Wet Bags

Company

  • About Us
  • Team Members
  • F.A.Qs
  • Gallery
  • Ship From USA
  • Blog
  • Product Inquiry Form
  • Contact Us
  • Privacy Policy

Contact Us

  • Phone / WhatsApp+86 181 2512 1337
  • Emailrose@shanhaoundies.com
  • Sales officeB1105, ZhanTao Technology Building, Longhua District, Shenzhen, Guangdong, P.R. China
  • FactoryXianbohuan East Road, Gurao Town, Chaoyang District, Shantou City, Guangdong, P.R. China

Copyright © 2026 Shantou Shanhao Knitting Co., Ltd. All rights reserved.

ISO 9001OEKO-TEX 100GOTSBSCIGRS

Flow Guide

Choose your flow type based on the number of pads, tampons or cups you use in approx. 12 hours.

1pad
Light
3pads
Medium
4pads
Heavy
5pads
Super Heavy
1tampon
Light
4tampons
Medium
5tampons
Heavy
7tampons
Super Heavy
½cup
Light
1cup
Medium
2cups
Heavy
2½cups
Super Heavy

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.

Size Chart

Find your true-to-size fit:

SizeUSUKEUHip (cm)Waist (cm)
XS4–68–1036–3888–9266–70
S6–810–1238–4092–9670–74
M8–1012–1440–4296–10074–78
L10–1214–1642–44100–10478–82
XL12–1416–1844–46104–11082–88
2XL14–1618–2046–48110–11688–94
3XL16–1820–2248–50116–12294–100
4XL18–2022–2450–52122–128100–106

Swipe sideways for EU, hip and waist

How to measure your size

Waist

Wrap the tape around the narrowest part of your natural waistline.

Hip

Measure around the fullest part of your hips with feet together.

Fit tip

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.