MP Global Products’ eco-friendly QuietWarmth® is an acoustical and insulating underlayment and supplemental heating system incorporating non-metallic electric radiant heating elements. Composed of 77% post industrial/pre-consumer fibers, the underlayment is offered in two on-the-shelf sizes - 3’ x 5’ and 3’ x 10’ – and two special order sizes of 1.5’ x 5’ and 1.5’ x 10’.