BUILT Neoprene Sleeve for 11-inch MacBook Air, Graphite Grid BUILT Neoprene Sleeve for 11-inch MacBook Air, Graphite Grid Made of durable Neoprene (the wetsuit material) backed by a plush inner lining designed to safeguard the contents Easy-access zip-top opening, travels easily in bags Form-fitting design secures device in place Measures 8-7/10-inches by 13-4/10-inches by 4/10-inches