.productDescriptionWrapper table{width:auto;}.productDescriptionWrapper *{box-sizing:content-box;-moz-box-sizing:content-box;-webkit-box-sizing:content-box;} The Superfeet ADD/APT System traces back to our start as the Sports Medicine Division of the Northwest Podiatric Laboratory in 1974. ADD/APT encompasses the biomechanical science, technology, function and craftsmanship that adjust your footwear’s flat, 2-dimensional midsole to your 3-dimensional foot. We developed a system to help you pick the right insole to improve your footwear. Insole PROFILE How the Superfeet insoles feel under your feet. Insole VOLUME The space in the footwear filled by your foot and the insole. LOW Most-accommodating shape and support LOW For almost every type of footwear MEDIUM Intermediate shape and support MEDIUM For casual and active styles of footwear HIGH Most shape and maximum support HIGH For roomy shoes and boots GREEN BLUE ORANGE BERRY COPPER BLACK PROFILE High Medium High Medium Low Low VOLUME High Medium High High High Low + Larger Image + Larger Image + Larger Image + Larger Image + Larger Image + Larger Image THE SCIENCE Based on the principles of podiatric medicine, Superfeet’s shape, design and manufacture have set the standard for support and earned over 40 U.S. and International patents along the way. Superfeet insoles help adapt the flat, 2-dimensional midsoles of your footwear to your 3-dimensional foot. The distinct Superfeet shape helps to stabilize the foot, while the deep, structured heel cup and full-length foam provide support and comfort. 3 KEYS TO EVERY INSOLE 1. Structured heel cup: Encapsulates and positions the soft tissue under the heel, maximizing natural shock absorption. 2. Rearfoot support: The support you feel towards the back of your arch and the front of your heel is the distinct Superfeet shape stabilizing the rearfoot. 3. Firm stabilization: A firm foam layer and a stabilizer cap combine to create the supportive shape that Superfeet are famous for. OUR FOCUS ON SUPPORT At Superfeet, we focus on supporting the rearfoot because it is where the majority of foot motion (standing, walking and running) originates. Movement adds stress upwards of 3x to 5x your body weight in impact forces per step or stride. On average active people take 8,000-13,000 steps per day. If the feet aren’t supported correctly, unstable movement can lead a whole host of foot health issues. Superfeet help stabilize your feet so they can work more efficiently.