Underwood Latex Mattress 7 Zone Natural latex 100% Made in Thailand. Size: 100*200*15cm. Latex mattress 7 zone : Characteristics of 100% rubber mattress designed to support the physiology of the human body. Lets sleep feel sleep relaxation sleep spine support or parts of the body with pressure of the body. Which is designed to accommodate a round hole in the seventh spot or the 7 Zone the key points are as follows: head, neck, flowing rear, waist, hips, Knee, and toe.