A good approach for me is to build a flexible sleeping system, with a means to
Make some comfort adjustments to that system.
For instance my Sleeping bag has vent & hood features to allow me to control temp.
I also utilize a ground cloth & or a reflective cloth, & a z pad as needed under my pad.
Several things to consider in pad selection:
Weight, thickness, size/shape, intended use, ie: seasonal / temp., Materials used,
& Design / Comfort features,
( some pads have noisy or slippery surface materials, or cold spots in between air chambers)
Total sleep system ie; shelter type,
floor / floorless, Bivy, Tarp.
Ground cloth, secondary foam pad,
pillow use, etc to name just a few.
Choose a pad to support your
sleeping bag / quilt temp ratings,
Thermal conductivity design. R value
(Not all manufacturers have adopted
Standardized R value rating procedures.
ASTM F3340-18.)