The Airsprung Ortho Trizone features a uniquely designed three-phase spring support system which offers extra support in the lumber region of the mattress. This means the mattress is able to better sustain the body where it most needs it creating an overall comforting feel. It maintains a gentle support to the lower and upper parts of the body. Its inner cushioning adds comfort while its tufted finish helps makes this a very relaxing mattress. It has an 8” fluted border and is covered in cotton rich damask covering.