BUILT Neoprene Slim Sleeve for 12-13-inch Laptop, Big Dot Black and White BUILT Neoprene Slim Sleeve for 12-13-inch Laptop, Big Dot Black and White Made of durable Neoprene (the wetsuit material) backed by a plush inner lining designed to safeguard the contents Elastic Neoprene back stretches over top, securing MacBook in place Checkpoint friendly and travels easily in bags Measures 10-4/10-inches by 12-7/10-inches by 1/2-inch