Sport-Tek - Sport-Tek PosiCharge Mesh 7" Short ST5100. Youth sizes are 5" inseam
Adult Size Chart : https://www.apparelvideos.com/cs/CatalogBrowser?todo=ss&productId=ST5100
Youth Size Chart: https://www.apparelvideos.com/cs/CatalogBrowser?todo=ss&productId=YST5100
