Synthetic-and-mesh Rubber sole 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. Sustainable FLYTEFOAM Midsole Technology - Our FLYTEFOAM technology provides exceptional bounce back and responsiveness, utilizing sustainable, lightweight yet durable wood-derived materials for a cushioned ride. Recycled Content Upper - Lightweight, breathable and sustainable material comprise our soft upper. EVA Sockliner - Removable sockliner that provides cushioning performance. AHAR Outsole - Acronym for ASICS High Abrasion Rubber. Placed in critical areas of the outsole for exceptional durability.