In the product description, this shell is made of neoprene for the Apple MacBook is offered. I ordered this sleeve for my ultrabook Samsung Series 5 Ultra 535U3C-A04. Since the dimensions of the Samsung are almost identical to the MacBook (22 x 31.5 x 1.8 cm), the sleeve fits perfectly. As can be seen in the pictures, there is inside a sewn tab, under which one pushes the Ultrabook, so it can not accidentally fall out when the ovens rice closures. A beautiful and thanks to the elasticity of the fabric is easy to handle additional security. The exterior pocket is actually as deep as the whole shell, you can here so a lot to accommodate accessories. With Neoprene covered a rarity, in my opinion, but very useful. The mentioned by some reviewers smell of the material is just the typical and usual smell of neoprene. Fairly strict, but I think that is lost. All in all, from me 5 star and a strong buy recommendation.