Asics Men's Gel Solution Speed 2 Clay Court Tennis Shoe 100% Synthetic Imported Synthetic sole Rear foot and forefoot gel cushioning systems: attenuates shock during impact and toe-off phases, and allows movement on multiple planes as the foot transitions through the gait cycle. Pguard toe protector Flexion fit P.h.f. (personal heel fit) Solyte midsole material: a lighter weight midsole compound than asics' standard eva and speva. Also features enhanced cushioning and durability.