MacCase 14/15 Mbp Ibook Sling MacCase Sling is the first ever Apple specific Sling that combines a completely original, innovative design with a highly protective, functional compact form. Lifetime Warranty. The Sling features dual compartments, built-in sleeve, accessory pockets, iPod/iPhone storage, 3-position strap design with oversize buckles and a breathable air mesh rear panel. MacCase BRIGHTSIGHT illuminates the inside