CT3 Checkpoint Friendly Tri-Pak 15.4" Backpack is smaller and more compact than the CT3 Apex backpack, the CT3 Tri-Pak fits up to 15.4" laptops. CODi Checkpoint Friendly cases are designed to save time and eliminate hassle while navigating airport security. CT3 cases feature two distinct compartments hinged by military grade ballistic nylon, which allow the case to lie flat while passing through airport x-ray machines and eliminate the need to remove the laptop from the case. Travelers can simply grab the case from the conveyor with one hand and go - the case secures itself with Velcro between the compartments.