I plugged it in, laid it across my lap and forgot about it.  It wasn't until hours later that I noticed my feet weren't frozen but comfortable.  For me, cold causes pain, or sure appears to.  At bedtime I have taken a microwaved cornbag and shoved it to the foot of the bed.  As I wiggle my feet in the warm corn, I can feel some pain melt away.  With the berber throw I haven't had "ice-cube" feet and forgot the cornbag.  I have less pain and I think it has lessened my restless leg syndrome.  I'm not aware it's in my lap.  I assume that's because it's very lightweight, oh so soft and the heat feels soft too.  It is large enough to puddle around my feet and still leaves enough for my little dog to share.  I hope it doesn't break.