Otterbox Otterbox Unlimited Case Ipad 5th Gen Ipad 6th Gen Slate Grey (77-59037) Designed with schools and K-12 students in mind, the UnlimitEd Series Case from OtterBox is engineered to fit 5th/6th-generation iPads. Made with polycarbonate, synthetic rubber, and polyurethane materials, the drop-resistant UnlimitEd comes with a built-in screen protector and an integrated stand that you can adjust for both typing and viewing angles.