ASICS GEL-FUJI ES Trail Running Shoes Rearfoot GEL Cusioning System - Attenuates shock during impact phase and allows for a smoo Trusstic - A molded component under the mid-foot area. Provides stability and in combinati Low Profile Midsole - This is a thinner to reduce weight making this one of the lihtest sh *** UPDATED *** Rearfoot GEL - The ASICS GEL system is based on a special kind of silicon