The Greensmart Akepa Macbook 13" & 13.3" Sleeve (Blue Ice) is a convenient, easy to use case which protects your laptop from everyday wear and tear. The outside of the case is made of Neogreene, a water-based eco-friendly alternative to neoprene. The inside fuzzy liner, made from 100% recycled plastic bottles (rPET polyester) combines with the 4mm walls provides optimal protection and minimum weight. This sleeve also has a specially designed gusset, so your laptop will breathe. The Neogreene is waterproof too, so if you spill on the outside, no problem. It is easy to grab zipper pulls (2, by the way), which rounds out the thoughtfulness.