The term 'wearable souvenir, informally' can be summed up as a 'TEE', which is a three letter word. A TEE is a type of clothing that is typically made of cotton or polyester and has short sleeves and a round neckline. It is often worn casually and is a popular item of clothing for people of all ages. TEE shirts are also commonly used as souvenirs, with designs or logos that commemorate a special event or place.