Product Description*From REI.com
Features removable, lace-up high altitude liners with a special reflective coating for top thermal performance, comfortable foam footbeds and an insulating brushed lining
Rigid and durable Pebax® plastic shells are completely waterproof and maintain flexibility in extreme cold
Hinged ankles and tongues made of soft plastic allow ankle flexibility; hard plastic uppers ensure support and protection
Rustproof, riveted hardware secures lacing; full rubber randing enhances edging ability and abrasion resistance
EVA midsoles add critical cushioning and insulation
Vibram® Stabeler outsoles offer excellent grip, stability and durability
Aggressively rockered soles balance the boots' stiffness and allow a normal gait during approach
Boots are compatible with step-in crampons
Style - Mountaineering
Cut - High
Waterproof - Yes
Upper - Thermoplastic elastomer
Lining - Brushed nylon
Midsole - EVA insert
Support - Thermoplastic shell
Outsole - Rubber
Crampon compatibility - Step-in
Average weight - 5 lbs. 10 oz.
Average weight - metric - 2.55 kilograms
Excellent all around boot. These boots suprise you in that they are not flashy, not particularly expensive, nor technically advanced. I liken them to the 50 year old Whirlpool washer/dryer at Sears. They got the design right 50 years ago, why mess with a good thing?
These boots are not the most comfortable boot on the market, but after a short break in period, they will again suprise you. I've heard complaints that they are heavy and cold. I have experienced neither. I took them on two trips to Denali and one winter ascent of Shasta and they performed like a charm. However, like all boots, you need to try them out and each persons feet dynamics/tollerance varies.
Some people have liner inserts and some have gone so far as to remove the stock liner and have a custom liner "vaccuumed" to their foot. I find that over time, these liners break down. I simply put in an arch support and that seems to work for me.