Mammut Sloper Low Canvas Shoes - Men's Textile Elastic GORE-TEX tongue construction 3 Zone Lacing: Individual 3-zone lacing. Can be adjusted to person and situation Base Fit: Sliding webbing transfers power from lacing area to soles, ensuring improved hold in boot to increase safety and comfort. Motion Control: Reinforced, flexible inside prevents you from twisting your ankle while maintaining full freedom of movement Memo Foam: Ensures individual fit and cushions foot at instep, shin and ankle