Getting down to the gram of things

Chirp-chirp

Does anyone sleep on just the 3/16th foam pad in warm weather?

Never used those specific pads but before I embraced comfort I used a windshield reflector to sleep on didn't feel any convection heat loss till about 40% weighed 4ounces for a 55inch by 23 one hope this helps some it's 3/16 inches thick with a foam side and Mylar on one side

the poncho/tarp should see some reduction in weight as you no longer need to carry rain protection- that should shave a few oz

the bivy while adding weight back in also provides a temp boost to your sleep system, that should add a little to the pro side of the equation, the bivy also negates a ground cloth (couple of oz's)

if you want to go all out, they make a cuben poncho/tarp :)

can't comment on the thin pad

<– uses cushy neoair! :)

I am super effecient at popping air matresses. I stick to CCF :)

I realize my original post is all over the place so here's a more direct question. What is the lightest CCF pad option? I'm talking about hot weather use so my concern is minimal comfort, minimal R value, and water proofness. GG and Oware sell 3/16th pads, does anyone know what the intended use for them is?

If you can, the 3/8 foam pad should be fine for summer in most places.
As I get older my joint pains keep awake so I have had to go with a thicker softer pad:-(

Using an ultralight bivy saves weight by:
allows for carrying a smaller tarp – save an once or two.
adds to the warmth – carry a lighter sleeping bag/quilt.
and no ground cloth required.

It also also allows for sleeping without having to setup a shelter if the the weather is OK.
The bivy will protect from dirt, mud, dew and light rain, but have the tarp nearby should the rain get heavy.

Get one with a bug net and you can keep the bugs off your face.

For the temps you mentioned I've been perfectly happy with no pad, and If I know the ground might have lots of prickly bits a thin ccf pad is definitely useful.

One of my typical kits consists of a 7oz poncho tarp, a 6oz bivy, and a (forget what it weighs) slightly larger than torso sized piece of 1/8" Thinlight from GG. In warm summer temps I sometimes skip a sleeping bag or quilt altogether and just use my clothes in the bivy, which makes for a very light and compact kit.

^ now that's a spartan kit- I like! :)

rough r values for thinner pads

1/8"- .45
3/16"-.67
1/4"-.90