Suoran Macbook Air 13 Inch Sleeve Wool Felt Case Macbook Cover Bag For Macbook Air 13 Inch (13.8X9.5x0.4) - Gray Wool felt is made of 100% natural wool. Wool felt have the characteristics of buffering and shock absorption, protecting your equipment at anytime and anywhere. Water-resistant, fire-safe, and prized for its deeply saturated lightfast colors. soft to the touch ?Weight light. Environmentally friendly material. Sustainable, renewable and biodegradable