Avengers, ASSEMBLE!! Show your love for Earth's Mightiest Heroes with this excellent piece of official Marvel merchandise. This officially branded design comes on a youth sized ringspun cotton T-shirt. These garments are mostly 100% ringspun cotton - however please be aware that the colours with a heather finish (Sport Grey, Dark Heather etc) are a polycotton blend (exact percentage of polyester varies dependant on colour). Please refer to the size guide in the pictures for sizing reference.