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Synthetic vs. Wool – What’s Best for Kids Thermals

Synthetic vs. Wool – What’s Best for Kids Thermals

With the colder months here and the promise of spring around the corner, it’s not too late to get some high-quality boys thermals for your kids. For many of you, winter may still have a grip when springtime arrives and having a boys thermal underwear set or two could be some excellent added protection against the colder weather.

Not all thermals are made the same, and it may take a bit of research to find the right kind before you invest in some thermals for your kids. There are a lot of choices out there that involve the right material, fit, and for some, style. Fabrics for good thermals are relatively straightforward. Only two options will work in keeping your kids warm, dry and comfortable during the winter season. These are wool and synthetics like polyester and polypropylene. This guide will break down on what to look for along with some advantages and disadvantages when buying boys thermals.


Synthetic fabrics like polyester or polypropylene are trendy due to their cost-effectiveness. They are also moisture-wicking meaning they won’t absorb sweat. Instead, they shift water away from the skin by natural evaporation and through the wicking process. They offer a stretchable material when blended with spandex for a close fit that allows full mobility and flexibility. Many are also odor-resistant and are treated with specific antibacterial treatments to prevent odors. Many synthetic thermals are also lightweight and thinner making them perfect as a base layer for sports and other activities. While reasonably suitable for all types of wear, over time, they may lose their shape if not blended with spandex material.


Of all the natural fibers, wool is the best at regulating your kid's body temperature. The fabric is naturally breathable to keep you comfortable while trapping your body heat to keep you warm. Like their synthetic counterparts, a wool boys thermal underwear set will also wick away moisture. They can also be worn for days and not smell bad as they have a natural odor-resistance. While perfect for thermals, they do have some disadvantages. These are more expensive than synthetics - if you get them wet, they are relatively heavy, and some kids may not like the feel of them as it may cause itchiness.

Synthetics and wool boys thermals are both excellent. The higher the quality of thermals, the better they will fit and they’ll perform for a more extended period. Consider what your kid will be doing in them before making a purchase. For intense activities, synthetics may be best and are durable enough to handle sports. If you are going camping, then wool would be a better alternative. Either way, both materials are well-suited for both outdoor and indoor use for added comfort. If cost is an issue, then synthetics are the way to go and it will still keep your kids warm and comfortable all season long.

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