Opti Canto Therapeutic Insoles I purchased these at a chiropractic clinic, but I'm selling them because I haven't had a chance to use them. They have been stored at home, so the outer box has some scratches. I will not accept transactions with overly sensitive individuals, nor will I respond to complaints or accept returns. All pain stems from an imbalance! Recommended for those who: ◆ Want to reduce uneven wear on their shoes. ◆ Want to reduce foot fatigue and impact. ◆ Want to correct their center of gravity when standing. ◆ Want to improve their sports performance. ◆ Want to prevent lower back pain and knee pain. ◆ Want to improve their posture and lose weight beautifully, etc...