Based on all the great feedback in my previous post about UL down jackets I have reached the conclusion that I probably don't want a UL jacket if the shell is super delicate or likely to get ripped or holes from typical use on BP trips.

As I look at the spec's on jackets I am trying to understand the relative durability of these fabrics. Can anyone shed any light on the difference between lets say:

30-denier Ballistic rip-stop nylon vs.

0.9 oz Dot-Ripstop Nylon vs.

15-denier Ballistic Airlight nylon shell, 40-denier nylon taffeta for reinforcements