Skins™ youth short sleeve top provides engineered gradient compression which encourages a better posture which acts as a respiratory aid, helping you breathe into the upper chest cavity and effectively take larger breaths. 
As with adults, exercise can cause muscle damage which can bring discomfort. Skins™ youth short sleeve top will help to significantly reduce muscle pain and speed up the muscle repair process.
Skins™ tops also work well to relieve delayed onset muscle soreness (DOMS) when worn after exercise.

Please see Images for size chart

Note: For a TOP if your size falls on a borderline it is recommended that you opt for the larger size. For a BOTTOM if your size falls on a borderline it is recommended that you opt for the smaller size.