The Men's ASICS Kayano has been our best-selling style at Super Runners Shop for a long time. The newest version # 27 will not disappoint. It's redesigned mesh upper helps keep feet cool, while the sole is more flexible to help promote a more natural roll through the gait cycle. This process starts in the heel with added flex grooves that isolate the initial impact to force a softer and smoother feeling at footstrike. At mid-stance, the foot should stop pronating and re-supinate for an efficient toe-off.