MY rules for ultralight backpacking look something like this:
NO cotton, anywhere, ever.
NO batteries, anywhere, ever.
No (rubbing) alcohol based products, anywhere, ever
Quality is non-negotiable. If it weighs less, but is lower quality, it is too much of a trade-off. You are trusting your life to equipment.
Build your own, and you know how to fix it.
Following these guidelines, the first thing added to the list is a towel available from REI. Use this instead of a cotton bandanna. It has all the same functionality, plus you can use it to dry off. The one used weighs 2 ounces.
Buy some 1oz pump sprayers on ebay. Use these for spray deodorant, sunscreen, and liquid soap. We already have sunscreen and liquid soap in the survival kit, and we add deodorant in this pound of gear.
1/2 ounce hand sanitizer weighs 1 oz. You can get one here.
The underwear included weighs 1.2 oz per pair. For 72 hours count the ones worn, plus 2.4 ounces (2 pairs) in the pack.
Silk T-shirts weigh 2.5 ounces. Like with underwear wear one, include 2 in pack weight. That totals 5 ounces.
Sock liners help prevent blisters when used with a regular sock. These weigh in at 1.75 ounces each.
Start out wearing a pair of (wool) hiking socks. Change out the liners daily and air out the wool socks every night.
Total weight of these products is a pound.
The next pound is food. 3 freeze-dried dinners totaling 16 ounces.
The next pound we will discuss includes a backpack. We have to carry all this stuff somehow. We will be placing 9 to 10 pounds in this backpack if you have followed the recommendations in all the articles so far. The pack will be water proof to protect the sleeping bag.
Last is a repair kit. Spend an ounce to fix sleeping pads. The one recommended in the next article requires inflation. It offers huge R-Value for very little weight.