Enjoy a better night's sleep with Helix's Birch Luxe Natural 11.5"" Cushion Firm Mattress. The Birch Natural Mattress combines cotton, wool, and latex for a premium hybrid design that is great for all sleeping positions. This mattress has targeted zoned lumbar support to help with spine alignment and back pressure relief with full perimeter (4 sided) edge support for complete structural stability. A Euro Top provides for added comfort and three individual layers of wool maximize airflow.