The goal of this first aid kit is to be ultra-light, yet capable enough to handle most medical issues until help arrives or I can get to civilization. I have worked to pair this list down to what I determine to be the bare essentials.
I believe that every person should assemble their own first aid kit from scratch. First, you should be familiar with what you have and how you use it. Picking your own kit makes sure you know your capabilities. Second, most ready-made first aid kits contain cheap and worthless items like strange band-aids, non-functional tweezers, and a whole slew of items you'll never use. Lastly, packaging of these ready-made first aid kits is probably around half the weight. So, take the time and make one, you'll be glad you did when you need it.