Tissue ischemia is one of the main etiologies of pressure injury. It is inevitable during bed-ridden and wheelchair bound conditions, such as spinal cord injury (SCI), or prolonged surgery procedure in the operating room. Active alternating pressure (AP) mattresses are covered by Medicare policy for patients with multiple/large stage 2/ stage 3 pressure injuries to relief interface pressure and prevent recurrence of pressure injuries. Previous studies demonstrated that the protective mechanisms of AP on pressure injury include redistribution of surface pressure, and allowing more blood supplies while lying on the support surface. The Dabir AP overlay is low profile yet possesses similar characteristics as other AP mattresses on the market; it is intended for clinical use, such as operation room (OR) where AP mattresses may not be an option. We expect Dabir AP overlay will be beneficial to people at risk of pressure injury by maintaining the blood supply during weight bearing condition.