The Synergy Sensor2 90 has a medium wide 102mm fit with a medium-stiff 90 flex index for accomplished expert frontside skiers. The Sensor Fit liner is a true lasted liner to address the common problem fit areas. The seamless one piece tongue and cushy cutout instep pocket eliminate pressure points across the tops of the toes and that pesky instep bone. The grippy rubber heel gives extra traction for walking around the resort. Aspiring expert all mountain skiers who need a wider fit without sacrificing performance.