The Master Silk Latex Executive 1800 is a beautiful mattress that is expertly designed with elegence, durability & above-all the highest level of comfort in mind. This mattress features an 1800 pocket unit & is made with 3.5 sapsa latex & a ravishing, silk cover. 1800 Pocket Unit 6cm Foam Encapsulated 3.5 Sapsa Latex Silk Cover