Under Armour Youth Girls Charged Cotton Supergirl V-Neck T-Shirt Part of the Under Armour Alter Ego Collection. 100% charged cotton. Natural performance cotton fabric delivers a soft, athletic feel for superior comfort . Sporty V-neck collar and slimmer fit deliver a sleeker, more feminine silhouette. Signature Moisture Transport System wicks sweat so it dries faster than ordinary cotton. Anti-microbial technology keeps your gear smelling fresher, longer.