Favorite Foams

[Kamper Kurt]

Is there a much difference between the Polyethylene and Volara foams? I can find the Volara at other sites. Any idea what the R-value might actually be? I think that 40 degrees at a 1/4 inch if it is soft and flexible would be awesome. Can't see a downside to testing it out.

Will any retail stores carry these foam types? I would like to check them out if possible.

[Kamper Kurt]

Will any retail stores carry these foam types? I would like to check them out if possible.

I would like a store because shipping is a flat $13 whether I buy 1 foot or 20 feet. And after that shipping becomes free. So if only ordering 3 feet the shipping costs more than the product.

[rustyshack11]

The thermarest zlite would be great cause you can also go to ground if need be. It seems to be a favorite on the appalachian trail.

[Doc V]

Is there a much difference between the Polyethylene and Volara foams? I can find the Volara at other sites. Any idea what the R-value might actually be? I think that 40 degrees at a 1/4 inch if it is soft and flexible would be awesome. Can't see a downside to testing it out.

This is a little late, but R is the inverse of thermal conductivity. On Foam Factory's website the product data sheet lists the thermal conductivity of their 2lb. polyethlene foam to be 0.25 so to get R you divide the thickness of your pad in inches by 0.25. The R values for the thicknesses are:

1/4" = 1
1/2" = 2
3/8" = 1.5.

If you layer pads, you sum the R values, thus a 1/4" + 3/8" pad = 2.5. I plan to use these pads layered over a self inflating open cell foam pad. This way my shoulder's are covered and my torso gets extra insulation.