I'm going on the Appalachian Trail, and I'm bringing... (3 of ?)

Have you ever played that game about packing your suitcase to go to Gramma's house? The first person lists something that begins with A that she'll bring to Gramma's house (an apple, for example). The second person says that he'll bring an apple, and also some beeswax. The third person says an apple, some beeswax, and crayons. Then it continues in this fashion. It's a memory game (and also good for learning your ABCs), suitable for long car rides, or waiting in line at the dentist's office. I highly recommend it. Like Chunks of Energy, it is unpackaged and very portable, and good for kids who want to grow!

If Chris, who left about a week ago to hike the Appalachian Trail, were to play this game, I am not sure he would even have 26 items to mention! He shared with us his 'essentials,' which he notes is 'very debatable in this material world.' Here they are:

ABCs to Bring on the Appalachian Trail

Note: The list is incomplete. What would you add?

• A: Air
• B: Bag for sleeping in (the Eureka! Silver City, to be exact. This will keep him in 30 degree weather.)
• C: Comfortable Shoes
• D: Determination
• E: Energy
• F: First Aid Kit
• G:
• H: 
• I: iPod ('for inspiration/entertainment as needed,' says Chris. I'm curious if and when he'll use it.)
• J:
• K:
• L:
• M:
• N:
• O:
• P: Pad, for sleeping on (the Thermarest NeoAir, to be exact)
• R:
• S:
• T: Tent (Henry Shire's TarpTent to be exact)
• U:
• V:
• W:
• X:
• Y:
• Z:

This adds up to 16 pounds, which Chris says means he's in the 'light range' of 11 to 20 pounds. Maybe one day he'll bring just an 'ultra-light' pack (under 10 pounds). At least determination is weightless!