BUILT Neoprene Twist Top Sleeve for 11-inch MacBook Air, Black and Charcoal BUILT Neoprene Twist Top Sleeve for 11-inch MacBook Air, Black and Charcoal Made of durable Neoprene (the wetsuit material) backed by a plush inner lining designed to safeguard the contents Zipper-free opening and bottom grips ensure easy insertion and removal of laptop Unique design secures laptop in place so it wont fall out Measures 12-inches by 8-1/2-inches by 3/4-inch