7-Zone Pocket Spring Mattress, 160x200 H3 Ergonomic Design with Comfort Foam, OEKO-TEX Certified WhiteReinforced Edge Support System utilizes high density foam encasement and additional perimeter springs to create a sturdy, supportive edge. This system increases the usable sleeping surface by up to 20 percent, prevents roll off when sitting or sleeping near the mattress edges, and maintains consistent support across the entire mattress surface for enhanced durability. OEKO TEX Certified Materials ensure all components (including springs, foam layers,