The Intuition Downhill Tongue Liners are designed to provide outstanding support, retention and energy transmission, and top tier comfort and warmth for downhill ski and snowboard boots. The Intuition Downhill Tongue Liners are available in stiffer High Density (HD) heat moldable Intuition Foam, as well as softer Dual Density (DD) Intuition Foam so you can dial in your perfect fit and get the maximum power out of your boots.