Marvel Mighty Thor Hammer Swing Girls Tanks Grab hold of your Marvel Mighty Thor Hammer Swing Heather Gray Racerback Tank Top because it's about to get windy! This soft breathable gray tank features a comic book-style Thor whirling his hammer around to create a powerful wind that will move buildings, mountains, and even you right out of your shirt! 50% Polyester, 25% Cotton, 25% Rayon. Designed with raw-edge hems.