This light and warm insulated single boot saves you energy and shaves half a pound off your feet by employing embossed Benecke CereCom fabric for the main body. Both waterproof & durable this high-tech synthetic is backed by an insulating layer of Synergy PTFE/200 g 3M Thinsulate and lined with with 3 bar knit to wick and disperse moisture, keeping you warm, comfortable and climbing.
Mobility and foot flexibility is enhanced by an Idro-Perwanger leather ankle cuff, molded PU ankle and back-stay and an adjustable EZ Flex tongue - which can be positioned to customize both volume and fit. Built on the familiar Makalu last the K4 S sports an insole of honeycomb and carbon fiber for lightness and low thermal conductivity with a Vibram Clusaz climbing rubber sole. Boot up with your K4 S for just about any discipline - cold weather alpine rock & ice rambles, waterfall ice climbing or general mountaineering. Delivered anywhere in North America.