Each T-shirt is a virtual brick for the First National Children's Hospital for Cancer, Critical Illness and Trauma, and it can be laid by you! You prove that you are strong by being part of such a project! The metallic foil makes it really "precious" for the cold season, and the message on it is precious in itself. Wear the T-shirt and our message will get everywhere. Thus, 100% of the money is invested in projects that save lives. The fabric is organic cotton.