The ASICS GEL-Craze™ TR 4 is a highly versatile cross-training shoe that's perfect for varied, intense workouts. This new edition provides athletes with comfort and protection to take their training to the next level. Stylish design, support and cushioning enhance any routine. Upper: Padded tongue and heel collar enhance comfort. Lace-up front offers an adjustable fit. Mesh provides breathable flexibility. Synthetic overlays offer lightweight support. Midsole: FluidRide® provides the ultimate combination of bounce back and cushioning properties with reduced weight and exceptional durability. Solyte® Midsole Material is a lighter weight midsole compound than ASICS' standard EVA and SpEVA® and features enhanced cushioning and durability. SpEVA® Midsole Material improves bounce back characteristics and decreases midsole breakdown. Rearfoot GEL® Cushioning System attenuates shock during impact phase and allows for a smooth transition to midstance.Outsole: AHAR® ASICS High Abrasion Rubber is placed in critical areas o the outsole for exceptional durability. FluidAxis® anatomically correct deep flex grooves have been aligned to the joints of the foot to enable the shoe to recognize, adapt and respond to the exact load and positional change from first impact to toe-off.