BrianLe is the only person on this forum to mention toe-socks (Injinji's) other than myself. Very functional and not too heavy, they are very good at minimizing hot spots and blisters. Down side for me is that I kill socks and they run about $15 a pair; I usually rip through the heals. I bring at least one pair with me all the time now (I find mixing up the type of socks I wear day to day really keeps my feet feeling good now matter how hard I push).