If you're looking for a lightweight, low-volume liner, the Men's Pro Flex Evo Liner is sure to catch your eye. Designed for the F1 Men's ski touring boot, this liner is fully customizable with its thermomoldable Intuition foam construction. Double pull tabs help get get these on smoothly (ah the struggle), with additional lace tabs to keep you secure. Travel light and fast with your feet thanking you while wrapped in these liners.