Tech21 Pure Tint Rugged Ultra Thin Case for MacBook Air 13" (2015-17) - Carbon Official Tech21 Product Retail Packaging Subtle carbon tint Steady typing platform UV resistant to avoid yellowing Impact-resistant materials With non-slip feet for stability and an ultra-slim profile created with the toughest materials, this case provides a slight touch of carbon with a whole lot of protection. You know it makes sense.