Description Sizes & Dimensions MagniCool 10 Firm mattresses are available in standard Twin, Twin XL, Full, Queen, King and California King sizes. The mattress is 10″ thick. Materials MagniCool Firm mattresses combine one layer of Elioform rigid foam with one layer of Eliosoft soft foam, padded with Memofoam and super soft fiber and covered in MagniCool fabric for maximum breathability.
