Material: Neoprene. Laptop sleeve outside dimensions: 15.5*11.7*0.5 &outside diagonal:18'';inside dimensions: 15.3*11.3*0.3 &inside diagonal:18''. Reversible- two distinct colors in one great case. Compact laptop sleeve design allows you to safely transport your laptop in any briefcase, messenger bag or backpack. This durable neoprene laptop sleeve can protect your laptop/notebook perfectly. Please check your laptop dimension before you place order.