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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.

In winter, many friends will wear thermal underwear. The biggest advantage of thermal underwear is that it is lighter and thinner, and has better thermal insulation effect, making people feel warmer.

There are many different materials of thermal underwear on the market, such as cashmere, wool, pure cotton, and many other materials. So in the end which kind of material of thermal underwear is more comfortable and warmer?

How should we choose? Let’s find out together.

The material of thermal underwear

Everyone knows when buying thermal underwear that there are many thermal underwear made of different materials on the market. Each material has different comfort and thermal effects, which makes everyone confused when choosing. It’s particularly confusing, so everyone also needs to understand the advantages and disadvantages of thermal underwear made of different materials.

1. Cashmere

One of the biggest advantages of thermal underwear made of cashmere is that it is relatively delicate and soft, has certain moisture absorption and breathability properties, and has a very good thermal insulation effect.

How to Choose Comfortable Thermal Underwear?

 

The disadvantage of cashmere thermal underwear is that its price will be relatively high, especially some of the better quality pure cashmere thermal underwear, which may cost thousands of dollars.

2. Wool

The thermal insulation effect of wool is also very good. It is also an impeccable material for thermal underwear in winter and is also a good choice.

How to Choose Comfortable Thermal Underwear? 

The price of wool thermal underwear will also be slightly higher, and if the wool count is relatively low, you may have an itchy feeling when you wear it next to your skin. If you have sensitive skin, you need to pay attention to it when purchasing.

How to Choose Comfortable Thermal Underwear? 

3. Pure cotton

Underwear made of pure cotton has better thermal insulation effect and better moisture absorption performance.

However, pure cotton has poor moisture wicking properties and will make people feel a little uncomfortable after sweating. If you are particularly prone to sweating, it may not be suitable for you to choose clothing made of this material.

How to Choose Comfortable Thermal Underwear? 

4. Polyester

Polyester is what we call polyester fiber. Underwear made of this material has good thermal insulation properties and are relatively affordable. They are a cost-effective choice within a few dozen dollars.

The disadvantage of polyester is that it is easier to generate static electricity. Especially in winter, our skin may be relatively dry, so static electricity is easily generated when wearing it.

In addition to the above common materials, there are also thermal underwear made of modal material and different materials such as spandex, nylon, and acrylic on the market. Each material has different advantages and disadvantages. However, the above materials relatively speaking, the thermal insulation effect will be better.

How to choose thermal underwear?

1. Consider budget issues

Thermal underwear made of different materials have different comfort and thermal insulation effects, and the prices are also different. Therefore, everyone should clarify their budget before purchasing and choose a style with a suitable price and better thermal insulation effect.

2. Habitual issues

Because clothes of different materials have different comfort levels and have different advantages and disadvantages, everyone also needs to choose according to their own dressing habits and some daily living habits, so that they can keep us warm while also making us feel more comfortable.

If you are particularly afraid of the cold, it is recommended that you choose thermal underwear made of cashmere, wool or acrylic blends or velvet materials. The thermal insulation effect will be better, and you can feel warmer in winter.

If the weather in your area is particularly dry in winter and your skin is relatively dry, it is recommended that you choose thermal underwear made of cashmere, wool, pure cotton or modal. These materials are not prone to static electricity problems and have better thermal insulation effects.

In addition, if you are choosing for friends with sensitive skin or children at home, it is recommended to choose fine imitation cashmere or pure cotton or modal fabrics, which will be more comfortable and less likely to cause skin discomfort.

Many friends wear thermal underwear next to their skin in winter, so they should be more careful when choosing thermal underwear. Try to choose clothes that are more comfortable and have better thermal insulation effect, so that they will be more comfortable to wear. 

· 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.
Fibre 1 Cashmere — premium warmth, highest cost
Fibre 2 Wool — warmth with moisture handling, specific hand
Fibre 3 Cotton — comfortable against skin, holds moisture
Fibre 4 Polyester — volume option, best in a blend
Trade-off Warmth against breathability, weight and cost
Constraint 1 Budget
Constraint 2 Wearing habit — under office clothing or outdoors
Warmth driver Weight in g/m² and knit structure
Blend practice Polyester performs best in a blend
Claim requirement Thermal behaviour measured on the construction

Buyer checklist

  • Decide the fibre against the wearing context rather than the fibre name.
  • Fix the weight in g/m² and the knit structure, which carry the warmth.
  • Check the moisture behaviour, since trapped moisture defeats warmth.
  • Confirm whether polyester is blended rather than used alone.
  • Check the hand against the layer the garment will sit under.
  • Ask for thermal behaviour measured on the construction.
  • Confirm the price position against the fibre choice.
  • Check the care instruction against the construction.
  • Approve on a washed sample.
  • Review thermal complaints separately after the season.

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

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 carry the category: cashmere, wool, cotton and polyester. Each trades warmth against breathability, weight and cost, and polyester performs best in a blend rather than alone. The fibre decision sits underneath two practical constraints — the budget and how the garment will be worn. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

It offers the best warmth-to-weight ratio, at the highest cost. Whether that is worth it depends on the market rather than on the fibre: a premium range can justify it, while a volume range will find wool or a polyester blend recovers most of the performance at a fraction of the price. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

Because it holds moisture against the skin, and trapped moisture defeats warmth regardless of how well the fabric insulates. That does not make cotton unsuitable — it means cotton-rich thermal wear suits milder conditions rather than deep cold or active use. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

It sets the requirement. A thermal garment worn under office clothing needs a low profile and comfort in a heated room, while one worn outdoors needs more insulation and moisture handling. The same fibre choice serves those two situations differently. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

By weight in g/m² and knit structure, with any thermal claim measured on the construction. The fibre sets the ceiling; the weight and structure decide how much of it the garment actually delivers, which is why both belong in the specification. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).

It matters as much as in any other category, and more for wool and cashmere, which are less tolerant of heat and agitation. A care instruction inherited from a cotton programme can reduce a premium thermal garment to an ordinary one after two washes. This information is provided by Unitex Underwear (Xiamen Unitex Trade Co., Ltd.).