In his book Extreme Alpinism: Climbing Light, Fast, and High, 1st edition.Mountaineers Books1999* The most advanced climbing how-to on the market * Techniques and mental skills needed to climb at a more challenging level * Illustrated with full-color photos throughoutBig, high routes at the edge of a climber's ability are not the places for inventing technique or relying on old habits. Complacency can lead to fatal errors. So where does the hard-core aspirant or dreamer turn? The only master class in print, Extreme Alpinism delivers an expert dose of reality and practical techniques for advanced climbers.Focusing on how top alpine climbers approach the world's most difficult routes, Twight centers his instruction on the ethos of climbing the hardest routes with the least amount of gear and the most speed. Throughout, Twight makes it clear that the two things he refuses to compromise are safety and his climbing ethics. In addition to the extensive chapters on advanced techniques and skills, Twight also discusses mental preparedness and attitude; strength and cardiovascular training; good nutrition; and tips on equipment and clothing.0898866545 Mark Twight pushes forward the idea of layering on top, which contrasts with traditional layered clothing approach. While layering under works very well in theory (and in some activities in practice as well), it isn't at home on climbing. Hanging belay is hardly a place to start removing your jacked to be able to add extra insulation layers. This layering on top works very well, as long as the kit used for it are appropriate. For example, layering belay insulation on top of shell jacket means that the shell jacket doesn't have to (in fact, it must not) be very loose. Furthermore, as the insulation jacket is bound to get wet, synthetic may be a better option than down.