This book is intended primarily for those concerned with the design of cushioning systems for the protection of fragile items in shipment. It should be pointed out, however, that this is not a design handbook. It does not provide "cookbook" methods for the solution of package cushioning design problems. Instead, it guides the designer to the tools he needs to solve these problems.The material contained here applies not only to package cushioning design, but also anywhere that shock and vibration are isolated by materials with distributed mass and elasticity. The contents should be helpful to those concerned with aerial delivery, space vehicle recovery and the isolation of underground structures from ground shock.