Outdoor furniture that is exposed to rain and sun should always use outdoor, reticulated, open-cell foam. This foam drains quickly and thoroughly, eliminating the presence of mold and mildew on your outdoor furniture. Outdoor chaise lounges are usually either for poolside relaxing and tanning, or part of a sectional sofa. For stand-alone outdoor chaise cushions, 1–2 inches is usually the right thickness, in which case we recommend our outdoor medium or firm foam. For outdoor chaise lounges that are part of a sectional, 4–6 inch thickness is best, and we recommend our medium outdoor foam. If you’re in need of help with how or what to order, let our experts in Customer Service help you make the right choice.