These portable mattresses use a two-layer design: a gel-infused memory foam comfort layer over a firm, high-density foam core; materials are listed as gel-infused memory foam and other certified foam materials.
Covers are machine washable—use cold water on a delicate cycle, do not use bleach, and hang or line-dry rather than using a dryer.
Padding options vary by model. Some playpens include a thick, soft padded floor or mattress pad, and at least one listing specifies a memory-foam fill for its padded surface—check the individual product listing for the exact padding type and thickness.
Most listings advise allowing 24–72 hours for a rolled memory-foam mattress to regain full shape; one listing specifically recommends 48–72 hours to reach its 4-inch thickness.
Hexagon playpens use a six-sided layout. Listed dimensions include roughly 53.5" × 53.5" × 29.5" and another listing at W48.00" × D41.00" × H29.50", so widths/depths in these examples range about 41–53.5 inches with heights around 29.5 inches.
