I want to make a custom sleeping pad to fit a non-rectangular footprint. I have 3.5” - 4” of thickness to work with. Are there any guidelines/suggestions on what foam or combination of foams and their respective thicknesses should be used to achieve a certain feel? The sleeping pad will be on a very firm surface.
I have tried a few combinations so far. I will describe them from the bottom layer of foam to the top layer.
- 3/8” cross linked polyethylene (XLPE) 2lb, 2” polyurethane
Could feel ground on hip and shoulder, otherwise comfortable.
- 1/2” XLPE 3lb, 2” polyurethane
Too firm. I don’t think I could feel the ground, but the 3lb foam is not much better than the ground.
- 1/2” XLPE 3lb, 1/2” minicel t200 (cross linked EVA), 2” polyurethane
Best so far, but can still feel very firm 3lb XLPE.
One idea is to use 2lb XLPE under minicel t200. Also, maybe I could benefit from replacing the polyurethane with something else.
I am asking because iterating is time consuming and expensive. Thank you for your input.