The midsole is a crucial part of footwear, particularly in athletic shoes. It is located between the outsole, which is the bottom layer that contacts the ground, and the insole, which is the layer that sits directly under the foot. The midsole is primarily responsible for cushioning and support, helping to absorb impact during activities like running or jumping. Typically made from materials such as EVA (ethylene-vinyl acetate) or PU (polyurethane), the midsole can vary in thickness and density depending on the shoe's intended use. A well-designed midsole enhances comfort and stability, contributing to overall performance and reducing the risk of injury during physical activities.