This is an officially licensed Big Bang Theory product.
This t-shirt features a cat and says "Soft kitty, warm kitty, little ball of fur. Happy kitty, sleepy kitty, purr, purr, purr"
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.