MT-H11ET - 11" Twin XL Gel-Infused Memory Foam Hybrid MattressThe Mira Collection presents our line of hybrid gel infused memory foam mattresses that form to your body, creating a customized sleep experience that is as unique as you are. The fabric covering the mattress is breathable, which allows for a comfortable nights sleep no matter the season. Our 11 inch mattresses feature four layer construction that consists of: 2 inches ventilated ultra plush gel infused memory foam, 0. 9 inch plush foam, 6. 3 inch 12.