Full Details from Amazon.com : http://www.amazon.com/gp/product/B00HAN96AU?tag=onigi-20

Incase Hammered Hardshell for 13 MacBook Air (Tropic Blue - CL60466)

Durable hardshell construction
Unique hammered texture
Easy snap-on attachment
Precision cut-outs for unobstructed access to all ports lights and buttons
Rubberized feet prevent slipping and promote air cooling