What is the difference between the full and ¾ length?
1) Full length is for footwear WITH removable insoles such as running or walking shoes. Make sure to remove the generic insole completely before inserting the Full length version of Barefoot Science. The Barefoot Science Foot Strengthening System works best on an even surface without a built-in arch or excessive cushioning. 2) ¾ length is for footwear WITHOUT removable insoles such as dress or casual shoes. These shoes feature a flat liner without an arch contour. The versatility of the ¾ length version is that it can easily transferred be transferred from shoe to shoe. RECOMMENDATION: It is important that the Barefoot Science insoles rest flat in your shoes. Depending on frequency of wear, body weight, and intensity of wear, each Model s lifespan will vary. The Arch Activation Foot Strengthening System™ insoles thin profile takes up as little room in your footwear as possible while providing the essential stimulus for continued healthy foot function despite the restrictiveness of encl