In reply to BD: Not sure how helpful this is, but I have Kayland Multi-Traction, a walking boot that has the same last and "phroof" lining as the Revolution. The fit is narrow, closer to La Sportiva than Scarpa. The waterproof barrier seals out water, but it also makes my feet overheat and sweat a lot. I'd say they're worth trying if you're looking for an alternative to the Nepal Extremes, but then again why would you want an alternative to the Nepal Extreme unless you prefer red over yellow? Are they cheaper?