How to choose the best undershirt for children now that they are in class with continuous ventilation 2026

With winter just around the corner, and with temperatures already very cold in much of the country at the end of autumn, a delicate moment arrives for fathers and mothers: how to protect their children from the cold now that schools are ventilated much more as a protective measure against COVID-19.

The answer is simple: just as we do when we are going to be outdoors for a long time at this time of year, in layers. And within this concept, which in fashion is called 'layering', there is a fundamental piece, the foundations of the concept: the undershirt.

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This atypical winter, the undershirt is the garment of the moment within the universe of children's fashion. It is essential due to the current circumstances that children go to school with it, although logically not all circumstances are the same, hence different details must be taken into account when choosing the most appropriate one for your child.

Type

It is the main differentiating factor, because there are strapless, short-sleeved or long-sleeved ones. The former prioritize movement, so they are ideal for children in grades where they do not spend many hours sitting at a desk. The short-sleeved ones are very versatile and protect more from the cold by covering the armpits, shoulders and part of the arm. And the long-sleeved ones are perfect for cold children, for specific days when the forecast is for it to be very cold, or for those children who spend a lot of time sitting in class, something common in advanced courses.

Composition and fabric

Within the undershirts there are models called thermal that are designed with special materials to maintain body heat in extreme cold situations. They are also breathable because they are designed to go under many layers of clothing. In principle, except in specific cases, they are not recommended for a child who goes to school. For these, it is enough to choose a design made of quality material and that it is warm. 100% cotton is the most advisable because it avoids possible skin problems derived from rubbing with a fabric that is usually tight, but they are also made of other raw materials such as nylon.

Size

It is very important to buy the right size because in addition to combating the cold, the undershirt has to allow the mobility of the person wearing it. You should not buy it smaller than the child's size so that it fits better, nor larger so that it lasts longer because then it will lose effectiveness. An interesting detail in this sense is that the shirt extends, within the appropriate size, enough to be able to tuck it into the pants comfortably.

Seams

Be careful with this detail because it is important not to underestimate it. Keep in mind that poor or excessively marked seams in the neck and armpit area, especially those with straps, can make the shirt very uncomfortable for the child, and in the worst case, cause chafing on the child's skin.

Child's circumstances

In this case, what the shirt is like does not influence it, but rather the child's age and routine in class. If they take a nap or not, if they have a lot of physical activity or their daily life at school is more sedentary, and their feelings also matter, if it is more or less cold.