McKenzie D-Section Lumbar Roll
The D-section lumbar roll provides lower back support for anyone who sits in a straight-backed chair. I am a male who weighs about 72.5 kg (160 lb). I have found the roll quite hard but I expect it to soften a little with use. The hardness allows the roll to maintain its "D" shape. I have used the roll for ten days and am pleased with the support it has given my lower back.