Originally developed for NASA, OUTLAST® is a new material that actually absorbs, stores and releases body heat to regulate the temperature inside the wearer's boots. The proprietary Kork® blend is durable, easy to work with, and guarantees to capture the best mold of your feet. The Superfeet Kork Custom Footbed is the ultimate in support, insulation, sensitivity, and power transmission for maximum edge control. Designed for the demanding downhill skier and snowboarder who requires high performance and superb command of the terrain.