Get the maximum benefit from these 7 step, ¾ Length insoles! The complete 7 Step Strengthening System is included to achieve the ultimate benefits for your entire body: Strengthened arches Reduced muscle fatigue Improved static and dynamic balance Relief from sore feet and so much more! The ¾ length is ideal for shoes with non-removable insoles or if you often find yourself switching between pairs of shoes. It is also a great choice for minimalist shoes. These ¾ insoles are also a great choice for cycling, skiing, snowboarding, and other sports footwear. Similar to walking in sand, Barefoot Science insoles cause the 20 muscles in each of your feet to fire in a way that makes them stronger. As with any muscle group, the more they are exercised, the stronger they get. The Complete 7 Step Strengthening system provides the most mid-arch stimulation. Mid-arch stimulation has been known to reduce proprioception deficits and strengthen neuromuscular pathways between the feet and the brain - not only enhancing performance, but also improving static & dynamic balance and contact time. Most athletes use this in-shoe technology as a natural performance enhancer. Not an athlete? This insole is also ideal for everyday wear for people from all walks of life. Customers who are on levels 6 and 7 describe a massaging sensation when walking with Barefoot Science. *The 3/4-length insole is recommended ONLY for shoes WITHOUT removable insoles. **SOLD AS A PAIR. Colors and packaging may vary. Overview Complete 7 Step Strengthening System of insole plugs included Built for all body types Strengthening Insole Plugs 6 and 7 designed to withstand a heavier footfall Great option for those with an active lifestyle, or those working on becoming more active! Additional stimulation to massage tense foot muscles Proactive and reactive