I just received a large shipment of closed cell foam pads.
One set is 3/16″ thick and a density of 29. This denser version makes a thin pad tear resistant. Sizes include full length versions for one (20×76″) or two (40×76″) as
well as a torso size (19×40″). The double wide version is often used by hammock campers
for insulation that wraps around the sides where the hammock fabric pushes the sleeping bag insulation flat. This thin foam, while not warm enough for a sleeping pad by itself in cold conditions, is nice to use under an inflatable pad to protect it from punctures and to add some warmth. The torso length pad is good in a day pack for emergencies, as a waterproof sit pad, to add stiffness to a frameless pack and can be cut up for splints or added as cushioning in side the shoes.
The second set of foam is 1/2″ thick with a density of 24. A touch warmer for the
weight, this foam is Waterproof to a Hydrostatic Head of 3500 mm. R value of 2.
Some have found this to be adequate for winter camping. Others double it up for
bitter cold. Sizes 40×60″, 20×60″ and 20×40″.