Clothing

The base layer should wick away sweat, so avoid cotton: it gets soaked and chills you when you stop. The mid layer provides warmth, and the more air it traps, the better. The outer layer deals with wind and water, which are two different tasks — a waterproof jacket tends to be less breathable than a windproof jacket. Expect it to be hot going uphill and cold on the ridge, so choose layers that can be quickly taken off and stowed. Try the fit in motion, not standing still.