Everyone's feet are unique, and different activities demand different types of footwear. Taking these variables into account, it's unrealistic to expect one insole to fit every shoe and every foot. That's why Superfeet designs different models to improve the fit of all your footwear - whether you walk, run, ski, hike, snowboard, play basketball, or work all day on your feet. Ordering the right size and Superfeet model is critical to your satisfaction. Foot type, footwear, and activity all play an important role in selecting the proper model and size.