ASICS Men's Gel-Domain 2 100% Synthetic and mesh Rubber sole Rearfoot GEL Cushioning System attenuates shock during impact phase and allows for a smooth transition to midstance P.H.F. (Personal Heel Fit) has 2 layers of memory foam that line the collar and mold to the athletes heel, creating a personalized fit SpEVA Midsole Material improves bounce back characteristics and decreases midsole breakdown Removable Sockliner accommodates medical orthotics NC Rubber Outsole Compound contains more natural rubber content than tradional solid rubber, resulting in enhanced traction on court systems