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For buyers: a men’s underwear buying guide is really a list of specification items — the type and its coverage, the fabric with a weight in g/m², the waistband construction and the size block. This page covers what each one decides.

Xiamen Unitex Trade Co., Ltd. is a professional underwear sourcing & supply-chain management company based in Xiamen, Fujian Province, in the Xiamen–Quanzhou–Jinjiang knitwear cluster of south-east China. Founded by Will Lin, who has worked in the apparel trade since 2004, the company has been exporting since 2009 and was incorporated in Xiamen in 2013. It runs its own liaison office in Jinjiang and works with a network of BSCI & OEKO-TEX Standard 100 certified partner factories to serve retailers and brands across Europe, the US and Australia.

Preface

-Research by microbiologists shows that 0.1 grams of feces will be produced in worn underwear a day. Underwear must be washed on the same day.

-Underwear soaked in boiling water will only change the protein on the underwear into deformed protein, and will also cause the underwear to fade and turn yellow. The underwear should be soaked in water of about 30 degrees for ten minutes, and then cleaned with a special underwear cleaner.

-It is more suitable to choose modal and ice silk underwear in summer. In other seasons, you can choose modal and pure cotton.

-Be sure to change underwear after exercise. Although the private parts do not appear to be sweating after exercise, many bacteria will breed in the warm and humid environment after exercise.

-You need to throw away your underwear and replace it with new ones after three months. Don’t feel bad. No matter how poor you are, you can’t afford underwear.

 

The mens can probably talk endlessly about their knowledge of the game!

You can study electronic and digital products again and again! 

But when it comes to how to choose underwear that is the most intimate contact with our bodies, most mens have a make-do attitude, as long as they can wear it. And how much do you know about some precautions when wearing underwear?

 

First, Types of underwear

Different underwear shapes have different properties and effects! 

Men's Underwear Buying Guide

Boxer: recommended by male doctors, they can reduce the restraint of underwear on the body and minimize the friction between thighs and crotch when walking, which is good for health.

Briefs: Suitable for people with thick legs, they can also lengthen the shape of the legs and make them more slender! It is also suitable for men who like sports and suffer from varicocele. But for men, because it tightly wraps the scrotum, it makes it difficult for the private parts to dissipate heat.

Boxer briefs: Compared with briefs, boxer briefs can reduce restraint and friction, and keep them ventilated. However, when choosing men’s boxer briefs, you should try to fit them as closely as possible. Choose cotton textures that are closer to the body than cotton. And for now, the design of boxer briefs neither is perfect.

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Second, Key points for choosing underwear

1. Breathability

Breathability is especially important! Especially in summer!

Underwear with poor breathability will make your crotch feel like you are in a sauna

Scientific research shows that the ideal testicular temperature is around 35°C. If the underwear is not breathable, the temperature will rise, resulting in sperm reduction or death.

 

2. Hygroscopicity

Due to the characteristics of mens’ physiological structure, every time a men goes to the toilet, he will leave some body fluids on his underwear. If the underwear is not absorbent enough, will the little “brother” feel comfortable?

Generally speaking, pure cotton and modal cotton have better air permeability and moisture absorption, so they are our first choice!

For people who sweat a lot, it is better to choose modal material, which is more sweat-absorbent, moisture-absorbent and breathable underwear.

In winter, you can choose pure cotton materials, which are warmer. 

3. Size

Most mens will choose to buy underwear online. If it doesn’t fit them when they come back, they should dress carefully.

Please note that when you buy underwear, you must choose the right size. Don’t give in because you buy the wrong size, otherwise it will be your little “brother” who suffers! Consider whether the size and material are comfortable, supportive and elastic. 

4. Wear resistance

Mens are as obsessed with underwear as women are with skin care products. They are unwilling to change to new ones even if they die. Therefore, due to fabric or quality reasons, many underwear either get stuck in the crotch or shift in “certain parts”. The more the underwear wears out, the thinner it becomes and become looser. After a long time, there are often holes! So never ignore that piece of cloth! No matter how poor you are, don’t be poor in underwear. Taking a step back, you can’t treat your “brother” who has been with you through life and death with three pairs of underwear for 10 yuan! 

Third, Warm tips

1. Change and clean every day

After wearing underwear for a day, a lot of dirt will remain. If the underwear is not washed and changed frequently, a lot of bacteria will breed. Over time, the stains on it will become stubborn stains that cannot be washed off even if you want to wash them. Therefore, underwear must be changed and washed on the same day. Even washing it overnight can easily breed bacteria, and it is best to wash it by hand.

 

2. Clean with neutral laundry detergent

Do not use soap when cleaning underwear. It is best to use neutral laundry detergent. Underwear is close-fitting clothing, and general soap is alkaline, which can easily irritate the skin when washed by hand. If it is not washed thoroughly, the residual chemicals will also irritate the skin, and alkaline substances will damage the clothing fibers to a certain extent, making it easy to cause hair loss. If it turns yellow and becomes old, it is recommended to choose neutral detergent for cleaning. It is not easy to leave residue, is gentle and non-irritating, and protects the color of clothes. Choose neutral laundry detergent, which is gentle and safe.

 

3. It’s best not to wash it with socks

Underwear and socks must not be washed together! Sweat, old keratin, Staphylococcus aureus, fungi and other substances and germs can be found on worn socks. Mixing them with underwear may cause cross-infection. Especially for people with athlete’s foot, if they wash socks and underwear together, the trichophyton rubrum that causes athlete’s foot may be spread to the underwear, causing tinea cruris.

 

4. Dry in the sun

The correct way to dry your underwear is to put your underwear in direct sunlight. If you put your underwear indoors to dry at will, the humid environment will produce more bacteria. If you do this often, you will easily suffer from inflammation…

 

If it is rainy and cloudy in succession, you should hang your underwear in a ventilated place to dry, or directly use a dryer, iron, hair dryer, etc. for high-temperature treatment.

 

5. During the inflammation period, scald with boiling water

For men with inflammation, in addition to wearing cotton underwear, it is best to scald the washed underwear with boiling water or cook it directly with a special cooking utensil to completely eliminate the germs.

Everyone must buy good high-quality underwear. As your boyfriend said, no one can wrong his “brother”. Also make sure to change your underwear regularly!

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· Xiamen Unitex Trade Co., Ltd. — OEM & ODM underwear sourcing partner

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Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.
Supplier Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — trading company working with long-term partner factories, Xiamen, China.
Item 1 Type and coverage — pattern and fabric consumption
Item 2 Fabric — fibre, ratio, weight in g/m²
Item 3 Waistband construction — the most visible quality variable
Item 4 Size block — determines where returns concentrate
Hygiene claims A reason to wash, not to specify differently
Anti-bacterial or moisture claims Need a test behind them
Documentation Each item recorded with its measurement
Comparability All four specified makes quotations comparable
Common omission Specifying the fibre without the weight
Review point Complaints mapped to the four items after the season

Buyer checklist

  • Specify the type and its coverage before requesting a price.
  • Specify the fabric as fibre, ratio and weight in g/m².
  • Write the waistband construction into the tech pack.
  • Check the size block at both ends of the range.
  • Ask for a test behind any antibacterial or moisture claim.
  • Treat hygiene arguments as care guidance rather than as a specification.
  • Compare two quotations against the four items rather than the price.
  • Check each item on a production sample rather than on a description.
  • Map complaints to the four items after the first season.
  • Approve on a sample that has been worn and washed.

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.)

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.

Sources & references

  1. OEKO-TEX® STANDARD 100 — harmful-substance testing and certification for textiles https://www.oeko-tex.com/en/our-standards/oeko-tex-standard-100
  2. ISO 3758:2023 — Textiles: care labelling code using symbols https://www.iso.org/standard/74401.html
  3. US FTC — Clothing and Textiles: labelling and advertising guidance https://www.ftc.gov/business-guidance/industry/clothing-and-textiles
  4. ASTM — textile standards and test methods https://www.astm.org/
  5. OEKO-TEX® Label Check — verify a certificate number at the issuing body https://www.oeko-tex.com/en/label-check/
  6. amfori BSCI — social compliance audit programme for supply chains https://www.amfori.org/amfori-bsci
  7. ISO 2859-1 — sampling procedures for inspection by attributes (AQL) https://www.iso.org/standard/2859-1
  8. ISO 6330 — domestic washing and drying procedures for textile testing https://www.iso.org/standard/75934.html

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.

Buyer Questions

MOQ, lead times, certification and trading terms

Four things: the type and its coverage, the fabric with a weight in g/m², the waistband construction and the size block. Those four explain most of the difference between two quotations for garments that look identical, and each is cheaper to specify than to correct later. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

They matter to the care guidance rather than to the specification. The hygiene argument that often opens this topic is a reason to wash the garment regularly, not a reason to build it differently — and any claim about antibacterial or moisture properties still needs a test behind it. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

As fibre, ratio and weight in g/m² rather than by name. "Cotton" is not a specification, and neither is "combed cotton" alone — those figures, with the knit structure, are what make two quotations comparable and what make a claim checkable against the sample. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

Because it is the most visible quality variable on the garment and the first component to lose recovery. It is also the item most often left to the supplieru2019s default, which is how two quotations built on different assumptions end up looking comparable on price. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

Where returns concentrate. Fit complaints cluster at the ends of the size range rather than at the middle, which is why the size block should be checked against the destination market and revised from an existing chart rather than inherited. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

By mapping them to the four specification items rather than treating them as one number. A complaint about fit points at the size block, one about comfort at construction, and one about hand-feel at the fabric — each with a different fix and a different cost. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).