This mattress comprises of 1550 pocket springs over two layers; base layer of 1050 & top layer of 500 mini pockets. The superior support & comfort is ideal for different weight sleepers. The Response 1550 has deep layers of zoned memory foam which moulds to the body contours for premium support & added pressure relief in key areas. The exclusive Sensaform airflow memory foam & hi-tech breathable mattress border increases breathability of the mattress for cool comfort night after night. The mattress also benefits from the posture perimeter plus system giving true edge to edge support & increased sleeping surface area. • 1550 Pocket Springs • Deep Layer of Zoned Memory Foam • Sensaform Airflow System • Breathable Border • Posture Perimeter Plus • Premium Deep Quilted Cover • Non Turn Mattress only needs to be rotated