We are proud to release the first-ever roller skating-specific insole to come to market through collaboration with Estro Jen & FP Insoles, using their proprietary King Foam material ideal for street or park roller skating. Roller skates are connected to your feet unlike a skateboard, therefore the impact shocks to a roller skater’s feet are greater. This is why FP & Estro Jen added some extra millimeters of cushion onto the roller skating version of the King Foam Elite insole making it the most shock-absorbing FP insoles made. Youtube Video: https://youtu.be/musRI78FxY8  Features Excellent impact protection and durability Thickness: 7mm toe to 9mm heel (notes on packaging may differ but these measurements are accurate) Dual-density arch chamber featuring our patent-pending construction method dynamically adapts to each step. TPU layer under fabric for extreme durability Absorbs more than 90% of shock energy in ASTM F1614 lab tests Break in period : 3-5 days Installation Follow instructions on the product package to cut insoles if needed Fit will be snug at first but will break in over time