Incase has crafted this Slim Sleeve with our refined, long-lasting Woolenex material, woven from both 300D and 600D polyester, which retains a slim form with the high-tensile strength of ballistic nylonmeaning you can use it consistently over extended lengths of time. The unique weave results in a lightweight, durable textile with beautiful color depth. On the inside, the soft, padded, faux-fur lining carefully protects MacBook against bumps and scratches during transport. And the Vislon zipper at the opening securely zips shut to keep MacBook safely enclosed within.