Cork keys for the Macbook Air, Pro, and Retina of all sizes. This product is precision cut and finished by hand in our Brooklyn workshop. The 3M adhesive used to attach the keys is easily removable and leaves no residue behind. Backlight feature is integrated as well as support for all international languages. Special thanks goes out to the 310 pledges that made this product a reality on Kickstarter! We support all the old models of the Macbook as well, additional keys are included in the set. Limited release product subject to the production of only 100 units that are to be sold and not reproduced again this season. Cork is a highly sustainable material that is gathered from the tree bark so no trees are cut down in the process. In fact 25% of the proceedings will go into planting more trees as we use this alternative to prevent the cutting of trees.