On the top of a Serta Perfect Sleeper Rise mattress, you’ll feel the pressure-relieving comfort layers with a soft to touch mattress top that’s hand-crafted from upcycled and sustainably produced SEAQUAL and TENCEL® fabrics. SEAQUAL is one of the most certified and earth-friendly fibres in the world. This high quality fabric is made from recycled plastics gathered from the ocean that’s then upcycled into threads and woven directly into the quilting on the top of the mattress. TENCEL®, is spun from fibres derived from certified Eucalyptus wood pulp that is treated in a "closed-loop" manner, making it safe and sustainable. TENCEL® naturally prevents bacterial development and improves moisture transfer performance, resulting in better moisture distribution on the surface.