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Thermal Underwear for Kids

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A warm foundation will make all the difference to your kids during winter sports. Introduce thermal underwear to their kit and we promise they’ll be keen to get out on the pitch or track, whatever the weather. Another advantage of base top or undershorts is moisture management and keeping a lid on rubbing.
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Welcome to Decathlon's boys base layers page. Our special range of boys base layers is designed specifically for winter sports and intensive sport activities such as football and other team sports. Discover our unique range of boys base layers now or take a look at our boys jackets here .