SafePORT® Air Cushion System Overview Every Corporate traveler notebook case includes the patented SafePORT® Air Cushion System, which combines vented air cushioning and high-density foam padding.   How Does it Work? Specially engineered cushions line the bottom and sides of the notebook compartment to protect the notebook from side and vertical impact. These cushions absorb shock and slowly force air out of the vents upon impact, then returning to their full protective strength in a split second. To protect against damage due to shifting, the cushions also adjust to fit different sized notebooks. Drop Test Data Protecting the notebook and its data is the most important element in the performance of a notebook case. Every day, notebooks are subject to shock and vibration, which could lead to substantial damage to the hard-drive and screen. The best cases prevent potential damage by reducing impact to the notebook. A five-sided drop test measures the G force (a force resulting from acceleration such as gravity) that is experienced when a computer is dropped from five different angles: bottom, left side, right side, back, front. The lower the Gs, the less impact or damage to the notebook.