The Intuition FX Race Liners are the custom liner ideal for racers who want to lower their time without sacrificing comfort. They do this with a dual-density foam layup, along with a soft layer of foam against the foot for comfort. These custom liners work well out of the box, but can be heat molded by a bootfitter, or on your own with the optional fit kit. Features include an extra stiff cuff and tongue reinforcements to reduce shin bang. These liners are made to accommodate narrow calves, but without sacrificing room in the foot. Get a pair of the FX Race Liners now and you'll be impressed with both your speed and your comfort.