Durable mesh and synthetic upper materials. Plush tongue and collar. Breathable fabric lining offers a great in-shoe feel. Removable foam insole. Rearfoot GEL® cushioning system absorbs impacting shock and promotes a smoother transition to midstance. Trail-specific outsole features reversed lugs for optimal uphill and downhill traction on varied terrain. Highly durable AHAR® (ASICS High Abrasion Rubber) rubber outsole.