The Karbon SP Series is a sleek and shock-resistant two-piece snap case. The 0.7mm thin outer shell is visibly lined with official DuPont™ Kevlar®, a woven material that is 5x stronger than steel at the same weight, providing incredible strength and resiliency in a lightweight design. The soft 1.3mm TPU inner layer provides added shock protection for the back and sides of your device. Altogether, the two layers come together for unbeatable protection at just 2mm thin. Plus, each Karbon SP Series case is treated and polished with our specially formulated, five-layer Evutouch® Coating for exceptionally easy-to-grip, scratch-resistant protection. Finally, since we designed our Karbon SP Series cases without any metal substances or components, you'll never have to worry about interference with your wireless signals.This differential weaving pattern is available exclusively at Apple stores and online at store.apple.com.