In the world of heat moldable liners, there's Intuition and then there's everyone else. The Intuition Pro Tour Liners are designed for use in alpine touring boots, featuring a tongue design with a diamond-shaped flex zone in the rear for optimal flex while skinning. This liner also includes a quick-release lace system and slightly thicker 9 mm foam in the sole for all day comfort. You don't have to use this liner for touring, but if you do you'll be in for a treat. We recommend having this liner heat molded by a professional bootfitter (like evo) if possible.