The iPACK (Infiltration between the Popliteal Artery and the Capsule of the Knee) block is an ultrasound-guided regional anaesthesia technique designed to provide posterior knee analgesia while preserving motor function. It targets the popliteal nerve plexus, which includes branches of the tibial, common peroneal, and obturator nerves. The iPACK block is primarily used alongside adductor canal or femoral nerve blocks for pain management following total knee arthroplasty (TKA) and anterior cruciate ligament repair. Its key advantage lies in minimising motor impairment compared to traditional sciatic nerve blocks, thereby reducing complications such as foot drop. Performed using an anterior or posterior ultrasound probe, the procedure involves depositing local anaesthetic in the fat-filled space posterior to the femur. A distal iPACK approach, targeting the femoral condyles, offers superior motor preservation compared to a proximal approach. Clinical evidence suggests combining iPACK with adductor canal blocks enhances analgesia and functional recovery post-TKA. At the same time, iPACK avosignificantajor neurovascular injury, potential complications include inadvertent vascular puncture or excessive local anaesthetic spread leading to transient motor weakness. This technique has gained traction as part of multimodal pain management strategies, improving post-operative outcomes with minimal impact on mobility.