What powder should I use to wash thermal underwear in a washing machine?
Thermal underwear has become very popular these days because it provides excellent protection from the cold. Despite this, few people understand how to properly care for it. There are special detergents for washing thermal underwear that help preserve its appearance and the fabric's structure. It's important to choose the right laundry detergents and gels to ensure your clothes last for many years.
Chemicals for thermal underwear care
There are special balms and gels designed specifically for washing thermal and sportswear. They are gentle on fabric and highly effective. Our rating below will help you choose the best ones based on price and characteristics. Let's look at the main parameters of popular detergents for washing thermal underwear.
- Nikwax Base Wash costs $3 for 300 ml. It's designed for hand and machine washing. It's suitable for synthetic fabrics, but it shouldn't be used on waterproof materials.
Caution! Never use laundry detergent for thermal underwear; only use special liquid detergents, otherwise you'll ruin the item irreparably.
- Trekko Sport Wash laundry gel costs $3.99 for 500 ml. It will help refresh thermal underwear and sportswear. It can also be used for hand and machine washing, even in cold water. Designed for synthetic and cotton fabrics, you can use this gel daily without worrying about losing its properties.
- Cotico gel costs $3.10 per liter. This thermal underwear detergent is machine- and hand-washable. Its primary purpose is to wash synthetic materials. It can be used not only for thermal underwear, but also for ski suits, down jackets, parkas, athletic shoes, and more. It features low foaming.

- SALTON Sport laundry detergent costs $3.25 for 250 ml. It's suitable for membrane materials, as it gently cleans even delicate fabrics. Furthermore, this thermal underwear detergent will help prevent future contamination of porous materials. It can also be used for tents, athletic shoes, and more.
- Nordland laundry balm for wool and silk costs $3.21 for 750 ml. It can be used for machine and hand washing of thermal underwear at temperatures from 20 to 40 degrees Celsius. It can also be used for washing other delicate fabrics, as it does not damage their structure or appearance.
- Wool Shampoo liquid is available for $5.90 per liter. It is suitable for machine and hand washing thermal underwear. It can also be used for washing other delicate fabrics, such as silk, wool, cotton, and special sportswear.
- Synergetic gel, labeled "for sportswear," costs $1.99 for 750 ml. Its primary purpose is to clean synthetic fabrics, including membranes, for both hand and machine washing. This thermal underwear detergent is hypoallergenic and environmentally friendly, and it can also be used on children's clothing.
The main purpose of thermal underwear is to maintain body temperature and absorb moisture. This allows a person to remain comfortable for long periods in cold weather or while exercising. Cotton, polyester, fleece, polypropylene, or wool are used to make this underwear.
Before washing thermal underwear, please read the washing instructions on the care label.
Be sure to follow the manufacturer's instructions to preserve the item's appearance and condition. Avoid using regular laundry detergents or those containing harsh ingredients (chlorine, bleach, etc.), as they can damage the fabric. Special products contain active ingredients that gently cleanse fabric from dirt without damaging it. You can buy them in household chemical stores, sporting goods stores, or online.
Wash according to the instructions
It's preferable to use a detergent specifically designed for thermal underwear when washing by hand. However, manufacturers still allow you to load items into the washing machine. However, be sure to strictly follow the instructions on the thermal underwear labels. Be sure to read them before washing.
When using a washing machine, please follow these rules:
- It is prohibited to wash thermal underwear made of merino wool, cotton and polypropylene;
- choose only delicate modes with the lowest speed;
- the temperature should not exceed 40 degrees;

- Turn off the spin and dry options (if available) before the wash cycle begins;
- do not use washing powder for thermal underwear, it is better to use liquid detergents;
- Under no circumstances should you use gels or balms containing bleach or other aggressive substances.
After washing, immediately place the underwear in a basin and let the water drain. Hang the thermal underwear to dry, but avoid a radiator or direct sunlight. Keep in mind that these items take a long time to dry.
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