The Prim half-arm plasticised fabric plaster cover is a product used to protect an injured arm that is in plaster. It is a cover that is placed over the cast to protect it from moisture and dirt, preventing it from getting wet or dirty. It is made of plastic-coated fabric, which makes it water resistant and easy to clean. It also has an elastic band at the top to fit the arm and prevent it from slipping. It is especially useful for people who need to keep their cast arm dry and clean while doing daily activities such as bathing, showering or even swimming. It is also useful for protecting the cast from damage.