This high-tech polymer shoe insole is recommended for treatment and prevention of heel and foot pain. The durometer has been formulated for maximum rebound time span at the average jogging pace for average weight of 175 pounds. Guaranteed maximum shock absorption and dissipation. It improves comfort in all walking and running footwear. Pleasant fragrance helps control foot odors. Has long life and does not harden. AAA-100 super soft, long wearing, brushed top covering. Easily trimmed with scissors.