Thor Hammer with Runes Valhalla Tristella Viking Norse Mythology Mjolnir. In Norse mythology, Mj?lnir is the hammer of Thor, the Norse god associated with thunder.Make sure they look adorable in a raglan tee designed specially for them with their favorite art, patterns or photographs! Made from 90% Cotton , 10% Spandex Soft, stretchy, lightweight and quick drying fabric Regular Fit Machine Washable Designs imprinted using an advance heat sublimation technique Attention: Due to bleeding and fabric stretch, the previewed image is only an approximated display of the final product.