Got a NeoAir in large last week. Decided to drag out all the other pads I have around the house and give some comparisons. Here is a Montbell UL Comfort system setup, a NeoAir large, a torso sized ridgrest atop a Thermarest Camplite, under that is a Ridgerest Deluxe XL 
Here we have me on the torso pad. I'm 6'3" 215lbs.This is my dogs pad now.
Here I am on the Montbell setup. Great quality and a good value, love the pillow and the toggle system.
Me on the way more comfy NeoAir
Look at the thickness
Which one would you rather find a place for in your pack?
The bottom line
I know what I want to carry….
