 The proposed research will allow us to understand how suspension systems influence prosthetic socket fit and residual limb tissue health and to formulate a knowledge base on two suspension systems providing prosthetists and clinicians the objective data to make better prescription decisions. In addition, the methods utilized in this study e.g., a residual limb limb volume scanner and assessing dynamic pistoning can be used to study current and novel suspension systems, liners, and prosthetic socket designs to provide a standard for comparison. 