Write me a description for a Disney Nightmare Before Christmas Gift Set. The Gift Set features a 12 Oz. Mug, Crew Socks, and a Christmas Ornament. The mug has a detailed character design of Jack Skellington and Sally, while the socks have Santa Jack designs. The Christmas Ornament has a wonderful design of Jack and Zero the Dog. This is perfect for fans of the magnificent cartoon. The socks are made of a soft and stretchy 98% polyester and 2% Spandex.