Think of it as springs per square inch of your body. (idealhome.co.uk)
These heaters work well when they are within a few inches of your body as in some of the lay down infrared units, but not when they are in a large sauna cabin. (infraredsauna.com)
I lost 19.2 lbs and 16.5 inches of body fat in 8 weeks!I would recommend this program to anyone!!!» (danettemay.com)