The Incase Icon Sleeve for the MacBook is equipped with advanced Tensaerlite technology and a lightweight EVA frame to optimally absorb shocks. A magnetic snap closure secures your MacBook while allowing for easy access. The Icon Sleeve is made from Woolenex, a wool-like polyester material that repels moisture, mold, and chemicals. This ultra-durable polyester-based fabric, which feels like a cotton blend, has high abrasion resistance and is resistant to stretching and shrinking.