TCA Thermal Long Sleeve T-Shirt for Men and Boys 10-12 Years Product Description The TCA thermoactive T-shirt for boys aged 10-12 is the perfect choice for cold weather workouts, running and all outdoor sports activities. Designed with young athletes in mind, it combines modern technology with comfort and functionality. Thanks to its compression properties, it supports muscles, keeping them active and warmed up, which translates into better performance and shorter recovery time after exercise.