Description Sizes & Dimensions MagniStretch 12 mattresses are available in standard Twin, Twin XL, Full, Queen, King and California King sizes. The mattress is 12″ thick. Materials MagniStretch mattresses combine one layer of Elioform high density firm foam, topped with two layers of Eliosoft foam. The layers are wrapped in Memoform and super soft fiber and covered in temperature-regulating Outlast fabric.
