Green Tea Memory Foam, Durable High Density Foam, and a Knitted Jacquard Cover General Note: Please allow 24 - 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state.The expansion time of the mattress will vary as per the surrounding.General Note: Please allow 24 - 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state.The expansion time of the mattress will vary as per the surrounding. AN AFFORDABLE RECIPE FOR GOOD SLEEP – Made with refreshing green tea extract, body hugging memory foam, and a modest price tag, the Green Tea Essential Mattress is a classic you’ll want in any spare bedroom, guest room, or kids’ room