Puncture-proof comfort at lightest weight, also great insulation for winter trips. 

Lightest comfort for torso, if you can deal with using your pack, etc. under your legs. 

Convenient, instantly accessible sit pad, good for additional length on a Nightlight™ 3/4, or for people who aren't quite ready to give up a thick inflatable pad that won't fit into their Gossamer Gear pack's pad holder.

Insulation. Great for under your legs if using a torso-only pad and people who sleep cold, or for desert hikers it works to keep the heat of the ground from disturbing your sleep. 

Hammock sleeping - great insulation, and it's stiff enough to stay put. For extreme ultralight or camping on soft ground, can be trimmed for a super minimal pad.

Hammock sleeping - better insulation than the 1/8" for cold nights, and it's stiff enough to stay put. For extreme ultralight or camping on soft ground, can be trimmed for a super minimal pad.