100% Synthetic Rubber sole FLYTEFOAM BLAST -Lightweight, midsole foam with energetic and highly responsive cushioning and bounce for an efficient ride. AHAR Plus Outsole -Strategically positioned in critical areas of the outsole, this exceptionally durable compound is 50% more durable than standard ASICS High Abrasion Rubber. Engineered Mesh Upper -Multi-directional mesh material improves ventilation and stability. Ortholite Lasting -This lasting material features plush underfoot comfort while providing excellent moisture management and a high level of breathability (Ortholite is a registered trademark of ATP Manufacturing LLC.) Reflective accents improve visibility in low-light conditions