Orthopedic is another high-end pocketed coil spring offering from the Perfect Relief Collection. The mattress is about 12 inches in height and is a Flip-Free Pillow Top, which enjoys the benefit of having no requirment of being fipped, throughout the year. This grade features the ACQ (Advanced Comfort Quilt). The ACQ technology benefits the customer through its unique feel and comfort level. The ACQ technical research focuses on the quilting since the body comes into contact with the quilted panel which is the surface of the mattress.The ACQ Technology blends in sophisticated convoluted layers of quilting to the mattress, creating specialized comfort zones. Each of these quilted types has a relatively denser zone in the centre one-third, providing additional support to the spine. Lush layers of polyester wadding passes through the Foam convolutions to provide supreme comfort. The ACQ layers are unique for the plush, luxurious feeling and breathability.