Lems’ Boulder Boot is an ultralightweight hiking boot, weighting in at only 9.9oz. The upper is made of water-resistant nylon and full-grain leather, and the whole boot is completely collapsible, great for storage in a pack. The sole is a 9mm LemsRubber injection rubber sole, and the insole is a removable 3mm MoistureWick foam. The boot lining is 100% cotton.