The Scarpa Phantom 6000 Men's Mountaineering Boot is an alpine workhorse especially designed for big peaks in the Andes, Canadian Rockies, and Alaskan Range. This boot caters to the light-and-fast alpinist than the Phantom 8000, but maintains the same sturdy materials for hard-wearing reliability in demanding alpine environs. It also reduces pressure points whilst walking and climbing, and thus increases better ankle flexibility and a more comfortable walking and climbing experience. The spiral zipper delivers a waterproof closure to the outer gaiter. The gaiter is made from three different materials: elastic S-Tech on the pressure points on the instep and on the back area; the inside is made of run-resist Super-Fabric and the outside made of a very durable Nylon and Kevlar. The Inner boot provides superb insulation, being extremely warm for very little weight. This inner boot also has a quick-lacing system with Dyneema cord for strength and a progressive fit.