100% Synthetic Imported Rubber sole Engineered mesh upper wraps the foot with a soft feel while improving breathability: ASICS LITE rubber is lighter, stronger, and more sustainable than standard outsole rubbers: AHAR outsole rubber improves durability: Rearfoot and Forefoot GEL Technology Cushioning System: Attenuates shock during impact and toe-off phases, and allows movement in multiple planes as the foot transitions through the gait cycle. Trusstic System technology: Reduces the weight of the sole unit while retaining the structural integrity of the shoe.