I wore the Original Orthotic for 10+ years. Back pain, hip and joint pain were alleviated. I recently reordered a pair and found them not as comfortable, but as I mature in age the skin on the bottom off my feet has thinned. Possibly this was my issue, but not completely sure. Customer Service traded out the Original for a flexible Intermediate. Fit well, very comfortable with same support and pain relief in my back, hips and joints. I am extremely pleased with the Intermediate Orthotics. Excellent customer service and Ernie the Natural Foot Orthotics owner personally provides follow up. Amazing this day and age to still do business with a company and people who really care about their customer.