The Sierra Sleep
by Ashley MyGel Hybrid 1100 Memory Foam 11 in. Mattress combines
memory foam with a traditional innerspring core - it's the best of both worlds.
This mattress also extends upon the memory foam revolution with the thermal
comfort of cooling gel. Gel-infused memory foam conforms to you to provide
luxurious support while allowing body heat to dissipate. Deeper down, this
mattress features a base layer of high-density foam topping a bed of
individually wrapped coils. The washable knit cover is easy to remove. A
foundation or box springs is not included.