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Thermal T-shirts with long and short sleeves 

Thermal T-shirts are excellent companions for sports and outdoor activities.

Order and try Berg Outdoor thermal T-shirts , which will surprise you with their thermo-regulating and insulating properties.

• Choose men's and women's thermal T-shirts from Authority in various colors. The favorable price will also please you. Don't miss Blizzard's long-sleeve thermal t-shirts made from functional material. Compression zones and seamless technology are a matter of course.

• For children, buy a thermal t-shirt from the brand Authority Kids , which will keep your little ones dry and warm during the entire skiing.

Do you already have a thermal shirt? choose suitable thermal pants to go with it or buy a set of thermal t-shirts and thermal pants .

To learn more about the features of thermal underwear, read our blog on the benefits of thermal underwear and how to layer properly .

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Special discounts
  • Men's thermal T-shirt from Blizzard. High-quality men's thermal T-shirt with raglan sleeves. Comfortable cut and material containing merino wool ensures comfort when wearing. Merino wool is characterized by good insulating properties, thanks to which thermal underwear will keep you warm. The T-shirt for men is a great companion for the winter season. A...

    57,99 €
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    4. 3XL
  • The junior thermal t-shirt is designed with a tight cut that fits perfectly to the body and guarantees effective thermoregulation during winter outdoor activities. The minimalist design is complemented by a practical stand-up collar that provides extra neck protection from cold and wind. It is made of a pleasant and flexible material that allows a high...

    26,99 € 29,99 €
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    6. 152/158
  • Men's thermal T-shirt from Blizzard. Functional thermal underwear for men will be a great companion for active men in the winter. It was designed and manufactured in the Czech Republic and brings you an advanced solution in the field of comfort and performance. The black thermal T-shirt has long sleeves and a round collar. Its cut adapts to the figure and...

    28,99 € 31,99 €
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    4. 3XL
  • Women's thermal T-shirt from Blizzard. High-quality women's thermal T-shirt with raglan sleeves. Comfortable cut and material containing merino wool ensures comfort when wearing and doing sports. Merino wool is characterized by excellent insulating properties, thanks to which the thermal underwear will keep you warm. Thermal T-shirt for women will please...

    57,99 €
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  • -55%

    The black long-sleeved thermal T-shirt for men is the perfect first layer of clothing, ideal for wearing under tops. It has a tight cut that perfectly hugs the body and provides comfort without restricting movement. The seamless construction minimizes the risk of chafing and irritation during activities, while ventilation zones promote air circulation and...

    16,95 € 37,99 €
    Reduced price!
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  • Women's thermal T-shirt from Blizzard. Functional thermal underwear for active women will be a great companion in the winter. It is suitable as a bottom layer for skiing, hiking or other winter activities. It was designed and manufactured in the Czech Republic and brings you an advanced solution in the field of comfort and performance. The black thermal...

    28,99 € 31,99 €
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  • -49%

    Blizzard boy's T-shirt. Thermal clothing will be a great accessory as a bottom layer for skiing, sledding or other winter outdoor activities. The undershirt for boys helps maintain body and muscle temperature with a special NoWet knitting method that creates a structure that enhances the natural properties of the materials. This type of knitwear helps...

    15,00 € 29,99 €
    Reduced price!
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  • -49%

    Girl's t-shirt brand Blizzard. Thermal clothing will be a great accessory as a layer under a sweatshirt for skiing or other winter outdoor activities. The undershirt for girls helps maintain body and muscle temperature with a special NoWet knitting method that creates a structure that enhances the natural properties of the materials. This type of...

    15,00 € 29,99 €
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  • -31%

    Children's T-shirt from Blizzard. A thermal T-shirt in a black and pink color combination for children will come in handy especially in the winter, when it will keep your child warm and comfortable throughout their stay outdoors. The children's undershirt helps maintain body and muscle temperature with a special NoWet knitting method that creates a...

    15,00 € 21,99 €
    Reduced price!
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  • New -49%

    Children's T-shirt from Blizzard. A thermal T-shirt for children is especially useful in the winter, when it will keep children warm and comfortable throughout their stay outdoors. The children's undershirt helps maintain body and muscle temperature with a special NoWet knitting method that creates a structure that enhances the natural properties of the...

    15,00 € 29,99 €
    Reduced price!
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  • -57%

    Men's thermal T-shirt from Blizzard. Grey Mens long sleeve T-shirt in a comfortable cut with raglan sleeves ensures comfort and freedom of movement. The thermal T-shirt is made of soft material that is pleasant to the touch and offers good insulating properties. The long-sleeved T-shirt is a guarantee of warmth even in freezing weather. Men's T-shirt will...

    17,00 € 39,99 €
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  • -48%

    Girls' T-shirt from the Authority brand. A thermal T-shirt for girls is a must-have piece of clothing for all little girls who like to do sports even in the winter. In addition, it has a beautiful colorful print. The insulated T-shirt has long sleeves and a round collar. The children's thermal T-shirt with long sleeves will please you with its pleasant...

    11,95 € 22,99 €
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  • -37%

    Fundango women's t-shirt. A functional t-shirt for ladies is a nice-to-have piece of clothing that should not be missing from the wardrobe of sporty women. The thermal T-shirt is made of pleasant material, which also guarantees a high level of movement. The close-fitting cut fits well and its length will also provide protection for the back. The women's...

    25,00 € 39,99 €
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  • -48%

    Girl's t-shirt from the brand Authority. The thermal shirt is a must-have piece of clothing for all little girls who like winter outdoor activities. The thermal T-shirt with long sleeves will delight you with its pleasant material, which is very comfortable to wear. Excellent air circulation is also a plus. Thanks to the tight cut, the girl's...

    11,95 € 22,99 €
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    Women's thermal T-shirt brand Blizzard. Viva long sleeve gray t-shirt with snowflake pattern. The comfortable cut with raglan sleeves ensures comfort and a high level of movement. The thermal T-shirt is made of soft material that is pleasant to the touch and offers excellent insulating properties. The T-shirt with long sleeves is a reliable protection...

    17,00 € 39,99 €
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  • -37%

    Women's thermal T-shirt from Fundango. The thermal T-shirt for women is made of a material that is pleasant to the body and is also flexible in all four directions. The slim fit fits well and its length also provides protection for the back. The long-sleeved women's T-shirt is suitable as a bottom layer under a jacket or sweatshirt and, thanks to the...

    24,95 € 39,99 €
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  • New

    The 4F Junior boys' thermal shirt is a great choice for sports and leisure activities during cold days. The black long-sleeved thermal shirt is made of a pleasant material that provides high comfort when worn and a pleasant feel against the skin. Thanks to its classic fit, it adapts perfectly to the body and does not restrict movement. The seamless...

    25,99 €
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  • -47%

    The light blue long-sleeved thermal t-shirt is a women's thermal underwear top that combines a minimalist design with a classic cut for comfortable wear. The thermal t-shirt for women offers a high level of movement, making it suitable for various activities, while the material is pleasant to wear and supports comfort throughout the day. Thanks to 4F Warm...

    23,95 € 45,99 €
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    The 4F Junior boys’ thermal shirt is a great choice for active boys who do not want to give up exercising even on cold days. The blue long-sleeved thermal shirt is made of comfortable brushed knit fabric, which provides high wearing comfort and a pleasant feeling on the skin throughout the day. The classic fit adapts very well to the body and, together...

    19,99 €
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  • New

    The 4F Junior girls’ thermal shirt is a great choice for all young female athletes who need reliable protection against the cold while on the move. The pink-and-black design looks stylish and sporty. The comfortable brushed knit provides softness, comfort and a pleasant feeling when worn throughout the day. The long-sleeved thermal shirt has a classic...

    19,99 €
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    2. 134/140
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  • New

    The 4F Junior girls' thermal shirt is designed for young active girls who want to stay warm and comfortable even on cold days. The stylish purple design is complemented by pleasant brushed knit fabric, which is soft to the touch and provides comfort throughout the day. The long-sleeved thermal shirt has a classic fit that adapts perfectly to the figure...

    19,99 €
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  • -44%

    The women's long-sleeved thermal T-shirt is designed in the form of a bodysuit with a crotch closure, which ensures practicality for everyday use. The minimalist design emphasizes a simple and elegant look, while the tight cut emphasizes the feminine silhouette while offering a wide range of movement. The women's T-shirt is made of a pleasant material...

    27,95 € 49,99 €
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  • -48%

    The 4F Women's Long Sleeve Thermal T-Shirt is an excellent first layer of clothing that can be easily worn under various types of outer layers. Its tight cut perfectly follows the female figure, which provides not only comfort, but also an elegant look during any movement. Thanks to this, the women's thermal T-shirt will be great for a wide range of...

    21,95 € 42,99 €
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  • -46%

    Men's long-sleeved thermal T-shirt is an ideal choice for active men who appreciate comfort and practicality in one. It has an asymmetrical print that makes the entire circumference of the T-shirt special and gives it a modern, distinctive style. The tight cut perfectly follows the body and provides comfortable support without restricting movement. The...

    22,95 € 42,99 €
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How to choose children's thermal underwear: how to keep children warm and comfortable on cold days
2025-10-16 08:02:57

How to choose children's thermal underwear: how to keep children warm and comfortable on cold days

Children's thermal underwear is an integral part of a child's wardrobe, especially during the colder months. It serves as the first layer of clothing that keeps the child's body dry and warm, preventing colds and ensuring comfort during games and outdoor activities.

Thermal underwear: what are its advantages and how to wear it?
2018-10-18 15:58:20

Thermal underwear: what are its advantages and how to wear it?

A few months ago we wrote about how to properly layer your clothing in the mountains. Today we'll take a closer look at the bottom layer - thermal underwear, or in other words, thermal underwear. What materials is it made of and how to choose the right one?