Marvel Guardians of Galaxy Vol. 2 Groot Athletic Womens Tank Let's hope you get picked for the Guardians' team, because they have the best uniforms like the Marvel Groot Guardians of Galaxy Vol. 2 Heather Purple Racerback Tank Top! A fun athletic-style print, reminiscent of a sport's jersey, features the lovable Baby Groot across the front on this cool Guardians of the Galaxy Volume 2 tank top. 50% Polyester, 25% Cotton, 25% Rayon.