Tredaire Softwalk 9mm Carpet Underlay - 15sqmComfort starts from the ground up. The Tredaire Softwalk 9mm Carpet Underlay gives your carpet that soft, supportive feel we all appreciate without adding bulk. At 9mm thick, its just the right balance of cushion and practicality for everyday rooms. Soft underfoot makes your carpet feel more luxurious from the first step Improves insulation helps keep rooms warmer with a 2. 69 tog rating Sound reducing cuts impact noise with up to 41dB reduction,