ASICS Men's GEL-Lethal Ultimate Field Shoe 100% Synthetic Synthetic sole Impact Guidance System enhances the foot's natural gait from heel strike to toe-off 10mm Heel Gradient shifts body mass forward reducing strain on lower limbs DuoMax Support system enhances support and stability, and is positioned sport specifically Asymmetrical lacing design is an anatomically correct environment that reduces potential for irritation and provides improved comfort and fit