La Sportiva - Olympus Mons EVO (Yellow/Black) - Mens: The worlds best high altitude double boots just got a bit better. Included in the EVO model is the elimination of the bathtub sole for a better crampon fit and a more breathable gaiter to help with moisture management. Cordura gaiter with abrasion resistant Aramide fiber reinforcement and high tenacity nylon combined with a PE insulating barrier. The outer boot consists of a Cordura upper with dual density PE micro-cellular thermal insulating closed cell foam lined with a thermoreflective aluminum facing. Also has an insulated removable footbed. The inner boot consists of a water-repellent breathable upper with dual density PE thermal insulating micro-perforated foam. Its lining is Tri-dimensional structured polyester combined with pile. Inner boot: Slip Lasted; Outer boot: Board Lasted. Vibram Montagna/XSV Rands sole. SBR Aircushion midsole with 4mm high density PE. 5mm carbon fiber insole plus 2.5mm PE microcellular thermal insulating closed cell foam topped with a thermoreflective aluminum layer reinforced with perforated hydrophobic non-woven facing. Shoe weighs 5 lbs., 6 oz.