nylon jersey knit cover with mesh gusset add a layer of comfort to your rv mattress foam is the most advanced foam on the market and is not temperature sensitive so it remains with machine washable cover for easy care 14" thick serene foam superior merp products sleepbetter highest level of comfort quality of angel soft“ gel fiber fill and 2" isotonic® memory foam with isofresh odor 2" angel soft" fiber 2" memory foam overfilled for comfort quilt-stitched cover is stain resistant and water repellent for durability cover is stain-resistant and water-repellent construction and is generously filled with hypoallergenic fiber for anti- microbial protection