Thanks. Yeah, the 1" was just an estimate but for accuracy's sake I just stuck a ruler in there. Got about 1/2" in the fluffier areas but I'd say packed, about 1/4". Currently have the thermostat set to 102 area. It also auto shuts off if the temp hits 110 and the dial goes up to 110. It's also supposed to blink when the heat mat reaches temp after about an hour but it still hasn't started blinking..