Exclusive Top Mattress: Pliable top mattress with a soft cotton-filled summer side, a New Zealand wool-filled winter side and natural latex in the middle. Luxurious year round comfort. Height 9 cm. (3.5) Natural Latex mid-Mattress: Made with premium 100% Talalay latex, free of allergens and other harmful agents. Transverse Pocket Spring System: For unparalleled comfort, measuring 13 cm (5.1”) tall. Longitudinal X-Pocket: Spanning the Marstrand widthwise for motion transfer control that promotes freedom of movement, without sacrificing support. Handcrafted Wooden Frame: Rest with a clear conscious knowing that the Marstrand is made entirely of premium hand-selected pine from Sweden’s sustainable forestry operations.