A few other suggestions: A pack towel, or some handi wipes. Great for drying off after a little clean-up and getting rid of condensation. I've also never brought spare glasses, never once needed them in a couple thousand days on the trail. If I'm going to be doing a lot of very steep, almost technical scrambling and climbing or bushwhacking through heavy brush I wear Croakies. Saves a few ounces. I've also found Buffs to be very useful, very multi-functional. They work as a beanie, a headband,(wet them and put on your head to cool off) an eyeglass cleaner, a neck warmer, a handkercief, you can use them as a loop to hang something, and on and on. If it is above 25, I just use the buff for a headband and save the weight of a beanie. When I don't need it, I just loop it on the strap of my trekking pole.