I was very nervous about my gear. You need layers, all synthetic or wool but not cotton, because cotton does not dry quickly. I wore wool socks with a silk liner. For pants, I wore a wicking base layer, light-weight hiking pants and waterproof rain pants. For the top, I wore a wicking base layer, a down vest, a synthetic down jacket and a waterproof rain jacket. Of course I wore a hat, with a purple pom pom that has been all over the world. On the glacier, I wore shoes with soles that did not bend because we attached crampons to the shoes. Basically, you stomp, not walk, up and down the glacier.