This is an officially licensed Saturday Night Live product.
Shirt features Christopher Walken as "Bruce Dickinson" saying "I Got A Fever. And The Prescription Is More Cowbell!"
Sheer t-shirts are made of a soft material and are slimmer fitting than your average t-shirt. Sheer t-shirts are generally made of a cotton/polyester blend, but may also be 100% cotton. The shirts are not see-through nor is there any loss of quality.