Each layer of the different natural filling materials found in the Clima Wool Ultra mattress provides superior comfort, enhanced with an orthopedically flexible shock absorbing structure. The natural temperature balance and superior humidity control of the Clima Wool Ultra mattress can be attributed to the goat wool and linen layers. providing a cool sleep in the summer and a warm sleep in the winter. Suitable for double-sided use, this mattress is a great match for those looking for a healthy and peaceful sleep.